Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
  • C08G77/42—Block-or graft-polymers containing polysiloxane sequences
  • C08G77/442—Block-or graft-polymers containing polysiloxane sequences containing vinyl polymer sequences
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F232/00—Copolymers of cyclic compounds containing no unsaturated aliphatic radicals in a side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic ring system
  • C08F232/08—Copolymers of cyclic compounds containing no unsaturated aliphatic radicals in a side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic ring system having condensed rings
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F277/00—Macromolecular compounds obtained by polymerising monomers on to polymers of carbocyclic or heterocyclic monomers as defined respectively in group C08F32/00 or in group C08F34/00
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
  • C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
  • C08L53/025—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes modified

Definitions

• Addition polymers derived from norbornene-type monomers exhibit a number of physical and mechanical properties, some of which are highly desirable while others are less desirable or even undesirable.
• the addition homopolymer of norbornene i.e., poly(bicyclo[2.2.1]hept-2-ene) exhibits some excellent characteristics such as optical clarity, low moisture absorption, and extremely high thermomechanical resistance having a glass transition temperature of about 380oC.
• a well known effective method of improving the properties of a polymer is to blend or alloy the polymer with another polymer (or polymers) in order to optimize a given property, e.g., toughness or heat distortion temperature.
• a polymer blend is simply a mixture of two or more polymers.
• the polymer blend can be either immiscible or miscible depending on the value of the free energy of mixing between the polymeric species.
• the thermodynamics are favorable for a miscible polymer blend; typically a one-phase system results.
• an immiscible polymer blend results giving, typically, a multi-phase system.
• To change the morphology of a blend the interfacial properties of the blend must be changed.
• One method to accomplish this is to add a compatibilizing agent to the blend. According to L. A. Utracki (Polymer Alloys and Blends. Thermodynamics and Rheology.
• interpenetrating networks by the synthesis of one of the polymers in the presence of the second polymeric constituent); or 3) modify the homopolymers by incorporation of functional groups. In many cases this may result in the formation of a polymer alloy, that is, an immiscible polymer blend having a modified interface or morphology.
• the morphology of the polymer alloy may be a very fine (sub-micron) dispersion or relatively large depending on the compatibilizer chosen, the amount of compatibilizer added, and the desired properties of the alloy.
• a polymer can be functionalized by copolymerizing the monomer with monomer(s) having a functional substituent.
• polyolefins particularly polynorbornene-type addition polymers are generally more difficult to functionalize by copolymerization processes because of the tendency of the polar groups in the monomers to poison the catalyst.
• PNB means polymers represented by structure II below.
• polycyclic addition polymers of this invention are derived from at least one norbornene-type (NB-type) monomer having the following structure:
• R 1 to R 4 independently represent hydrogen, linear and branched (C 1 -C 20 ) alkyl; hydrocarbyl substituted and unsubstituted (C 5 -C 12 ) cycloalkyl; substituted and branched (C 5 -C 1- ) cycloalkenyl (C 6 -C 24 ) aryl; (C 7 -C 15 ) arakyl; linear and branched (C 2 -C 20 ) alkenyl; (C 3 -C 20 ) alkynyl; any of R 1 and R 2 or R 3 and R 4 can be taken together to form a (C 1 -C 10 ) alkylidene group; R 1 and R 4 when taken together with the two ring carbon atoms to which they are attached can represent saturated and unsaturated cyclic groups of 4 to 12 carbon atoms or any aromatic ring of 6 to 17 carbon atoms; and n is 0, 1, 2, 3, or 4.
• hydrocarbyl is meant that the substituent is composed solely of carbon and hydrogen atoms.
• Representative hydrocarbyl substituents include linear and branched (C 1 -C 10 ) alkyl, and linear and branched (C 2 -C 15 ) alkenyl.
• NB-type monomer as used throughout the present specification is meant to include norbornene as well as any higher cyclic derivative thereof so long as the monomer contains at least one norbornene moiety as set forth in the structure above.
• Representative monomers of structure I include 2-norbornene, 5-methyl- 2-norbornene, 5-hexyl-2-norbornene, 5-decyl-2-norbornene, 5-phenyl-2- norbornene, 5-naphthyl-2-norbornene, 5-ethylidene-2-norbornene, 5-vinyl-2- norbornene, 5-hexenyl-2-norbornene dicyclopentadiene,
• dihydrodicyclopentadiene tetracyclododecene, methyltetracyclododecene, tetracyclododecadiene, dimethyltetracyclododecene, ethyltetracyclododecene, ethylidenyl tetracyclododecene, phenyltetracyclododecene, trimers of cyclopentadiene (e.g., symmetrical and asymmetrical trimers).
• polycyclic polymers (NB-type polymers or PNB's) derived from the monomers described under structure I above are represented by the following structure:
• R 1 to R 4 and n are defined above; and a represents the number of repeating units present in the polymer.
• the structural repeat units derived from the NB-type monomers of this invention insert into the polymer backbone via linkages derived from the double bond present in the norbornene moiety (i.e., 2,3- enchainment).
• the repeating units are joined directly to one another without any intermediate linkages between units.
• the polymer backbone is free of olefinic unsaturation.
• functionalized PNB's can be prepared from PNB's containing terminal olefinic unsaturation.
• terminal olefinic is meant that the PNB is terminated with an ⁇ -olefin, isobutylene, or diisobutylene as follows: wherein R 5 is hydrogen or linear or branched (C 1 -C 10 ) alkyl. Representative R 5 substituents include hydrogen, methyl, ethyl, propyl, i-propyl, butyl, t-butyl, and pentyl radicals.
• Terminal olefinic unsaturation and terminal isobutylene, or diisobutylene polynorbornene-type polymers containing unsaturation can be prepared by the novel chain transfer mechanism of the catalyst system of copending patent application U.S.S.N. 08/829,863 filed on November 15, 1994, which is incorporated herein by reference.
• Terminal unsaturated PNB's such as vinyl-terminated and isobutylene-terminated PNB, provide an entry point to access a host of functionalized PNB's specifically at the polymer chain end. These polymer chain end functional PNB's can be accessed by a variety of stoichiometric as well as catalytic reactions known to those skilled in the art of carbon-carbon double bond chemistry.
• PNB's having terminal olefinic moieties can be functionalized by formation of, but are not limited to, epoxy, monoalcohol, diol, anhydride, aldehyde, carboxylate, dicarboxylate, amide, nitrile, amine, and sulfonate moieties.
• Terminal PNB-epoxides can be prepared from the reaction of an ⁇ -olefin or isobutylene terminated PNB and m-chloro-perbenzoic acid (MPBA) in an appropriate solvent as follows:
• the terminal PNB-epoxides can also be prepared by reaction with other hydroperoxide or hydroperoxide mixtures such as t-butylperoxide or hydrogen peroxide and acetic acid mixtures as related by J. H. Bradbury and M. C. Seneka Perera in Ind Eng. Chem. Res. 1988, 27, 2196.
• the PNB-epoxides can also be prepared via catalytic epoxidations using well-known transition metal catalysts as detailed by K. B. Sharpless and T. R. Verhoeven in Aldrichimica Acta 1979, 12, 63.
• the terminal PNB-monoalcohol can be prepared from the reaction of vinyl terminated PNB with 9-borobicyclo[3.3.1]nonane (9-BBN) followed by hydrogen peroxide, and NaOH in an appropriate solvent as follows:
• the terminal anhydride-PNB can be prepared by the reaction of isobutylene terminated PNB and maleic anhydride (ene reaction). The reaction is schematically represented as follows:
• the terminal anhydride-PNB can be further reacted under acidic or basic conditions to form a dicarboxylate functional-PNB.
• the diol terminated PNB can be prepared by the reaction of an epoxy terminated PNB with HClO 4 /H 2 O (perchloric acid).
• the reaction scheme is set forth below:
• the aldehyde terminated PNB can be prepared from the
• aldehyde end group moiety can be further reacted with hydrogen to form the alcohol-terminated PNB catalytically.
• This transformation is well-known to those skilled in the art of the "oxo" process as described in Principles and Applications of Organotransition Metal Chemistry by J. P. Collman, L. S. Hegedus, J. R. Norton, and R. G. Finke, University Science Books, Mill Valley CA, 2nd ed., 1987, p. 621 and in Homogeneous Catalysis by G. W. Parshall and S. D. Ittel, John Wiley & Sons, 2nd ed., 1992, p. 106.
• This transformation is typically carried out using a suitable cobalt or rhodium catalyst such as phosphine-modified dicobalt octacarbonyl and phosphine-modified rhodium complexes.
• Azacarbonylation is typically carried in the presence of mainly nickel and cobalt catalysts and in presence of ammonia, aliphatic amines, or aromatic amines as related by I. Tkatchenko in Comp. Organomet. Chem. G. Wilkinson, F. G. A. Stone, E. W. Abel, eds., Pergamon, 1982, vol. 8, p. 172.
• Hydrocarboxylation is typically carried out in the presence of a cobalt catalyst such as dicobalt octacarbonyl under CO pressure in either an alcohol (to form the carboxylate) or water (to form the carboxylic acid) cosolvent as related in Homogeneous
• Hydrocyanation is typically carried out in the presence of nickel tetrakis(phosphine) or phosphite complexes and hydrogen cyanide as related in
• nitrile functionality can be hydrogenated to the terminal amine functionality using stoichiometric reagents such as lithium aluminum hydride or catalysts such as RhH(PPr i 3 ) 3 and H 2 or Raney nickel and sodium borohydride in alcohols.
• stoichiometric reagents such as lithium aluminum hydride or catalysts such as RhH(PPr i 3 ) 3 and H 2 or Raney nickel and sodium borohydride in alcohols.
• a further embodiment of this invention includes the sulfonation of the terminal olefinic unsaturated PNB using sulfonation reagents such as acetyl sulfate (a mixture of sulfuric acid and acetic anhydride). This transforms the terminal olefinic unsaturated PNB into a sulfonic acid that may be neutralized using bases such as lithium hydroxide or magnesium hydroxide to form ionomeric species.
• sulfonation reagents such as acetyl sulfate (a mixture of sulfuric acid and acetic anhydride).
• the acrylate terminated PNB can be prepared by the reaction of a hydroxy-terminated PNB and acryloyl chloride as shown by the following reaction scheme:
• terminal olefinic, isobutyl, and diisobutyl PNB polymers used in the preparation of terminal functional PNB's of this invention can be prepared from a reaction mixture comprising one or more norbornene-type monomer(s), a
• the CTA is selected from a compound having a terminal olefinic double bond between adjacent carbon atoms, wherein at least one of the adjacent carbon atoms has two hydrogen atoms attached thereto.
• the CTA is represented by the formulae:
• Preferred CTA's include ethylene, propylene, isobutylene, 4-methyl-1-pentene, 1-hexene, 1-decene, and 1-dodecene.
• the CTA's incorporate exclusively as terminal end-groups on each PNB chain.
• the CTA's do not copolymerize into the PNB backbone.
• a representative structure is shown below:
• the terminal functional PNB polymers of this invention can be reacted with any coreactive moiety containing a functional group that is reactive with the terminal functional group on the PNB polymer.
• the coreactive moiety can be monomeric, oligomeric, or polymeric and the term as used herein refers to coreactive plasticizers, lubricants, impact modifiers, heat distortion modifiers, processing aids, compatibilizers, and polymers.
• the terminal functional PNB's of this invention can be utilized to prepare
• R 6 polybutadiene, polyisoprene, polystyrene poly( ⁇ -methylstyrene), polymethylmethacrylate, polyalkylacrylates such as polybutylacrylate, or other anionically polymerized polymers that can be functionalized to an acid.
• an A-B-A block copolymer can be obtained as follows:
• R 7 represents polybutadiene, polyisoprene, polystyrene, poly( ⁇ - methylstyrene), polybutylacrylate, polyester, polyamide, polyamic ester, polyether.
• the PNB will be end-capped with an urethane group as follows:
• R 8 is hydrocarbyl and silyl such as (trialkoxy)silyl isocyanate.
• hydrocarbyl is meant linear and branched (C 1 -C 15 ) alkyl, linear and branched (C 1 -C 2 ) alkenyl, (C 6 -C 20 ) aryl, and araalkyl (C 6 -C 15 ).
• A-B-A block copolymer > wherein R 9 represents a polyurethanes, polyureas, and polythioureas.
• Vinyl terminated PNB can be subjected to a hydrosilation reaction in the presence of a platinum catalyst as related by J. L. Speier in Advances in Organometallic Chemistry 1979, Vol. 17, p. 407, to give A-B-A block copolymers wherein the PNB comprises the A blocks with a polysiloxane B block as follows:
• R 10 independently represents (C 1 -C 15 ) alkyl, (C 6 -C 20 ) alkyl, or (C 6 -C 24 ) aralkyl, m is 2 to 10, a represents the number of repeating units of the siloxane unit.
• epoxy terminated PNB can be reacted with a difunctional acid terminated polybutadiene (HOOC-polybutadiene-COOH) or an aliphatic diacid (HOOC-R-COOH) to give A-B-A block copolymer products.
• HOOC-polybutadiene-COOH difunctional acid terminated polybutadiene
• HOOC-R-COOH aliphatic diacid
• polymers with terminal-olefin unsaturation such as, for example, allyl terminated polyisobutylene can be directly appended to the terminal end of a PNB via the chain transfer mechanism utilized to prepare the olefin terminated PNB starting materials of this embodiment.
• chain transfer mechanism utilized to prepare the olefin terminated PNB starting materials of this embodiment.
• Other polymers that can function as polymeric chain transfer agents are olefinic terminated polyolefms such as polyethylene, polypropylene, and ethylene/propylene (diene) rubber.
• functionalized PNB's can be prepared from PNB starting materials that contain olefinic unsaturation that is pendant from the polycyclic structural repeat unit (i.e., pendant olefinic PNB).
• Groups that provide pendant olefinic unsaturation are (C 1 -C 10 ) alkylidene (C 2 -C 10 ) alkenyl wherein the unsaturated double bond is at the terminal end of the substituent (C 5 -C 8 ) cycloalkenyl, and a (C 5 -C 8 ) fused ring cycloalkenyl ring structure.
• Preferred substituents include ethylidene, vinyl, cyclohexenyl, and a cyclopentene ring taken together with two adjacent carbon atoms on the polycyclic repeating unit (i.e., dicyclopentadiene).
• Representative PNB's with pendant unsaturation are set forth as follows:
• polymers are polymerized from one or more of monomers selected from formula I. Homopolymers and copolymers are contemplated within the scope of this embodiment.
• the PNB's with pendant unsaturation are made by copolymerization of the respective comonomer constituents using nickel-based catalysts.
• the nickel- based catalyst system may include the addition of nickel-(II) ethylhexanoate to a dichloroethane solution of the comonomers and a suitable chain-transfer agent (an alpha-olefin such as 1-decene) if desired to control molecular weight, followed by the addition of a trialkyl aluminum (e.g., triethylaluminum, tri-iso butylaluminum, etc.), followed by a chlorinated activator (e.g.,
• the nickel-based catalyst system may include the addition of a Br ⁇ nsted acid such as HSbF 6 to nickel (II) ethylhexanoate, followed by addition of this mixture to a dichloroethane solution of the comonomers (optionally including a chain-transfer agent), followed by addition of BF 3 Et 2 O and a trialkylaluminum such as triethylaluminum.
• a Br ⁇ nsted acid such as HSbF 6
• nickel (II) ethylhexanoate nickel (II) ethylhexanoate
• the PNB's containing pendant unsaturation can be functionalized to form epoxy, monoalcohol, diol, carboxylate, anhydride, sulfonate, amide, nitrile, and amine.
• the PNB's containing pendant olefinic groups can be prepared in the same manner as described above for the PNB's containing terminal olefinic groups.
• the pendant epoxide functionality can be converted to the diol as described above in the terminal functional epoxide embodiment.
• the PNB's with pendant epoxide functionality can be coreacted with acid and diacid chlorides set forth above to give A-B and A-B-A block copolymers.
• the epoxide pendant functionality undergoes any reaction that the monoepoxides discussed above can undergo.
• Polynorbornene copolymers such as PNB/ENB, PNB/vinyl norbornene, PNB/cyclohexyl norbornene and PNB/DCPD, most preferably PNB/DCPD copolymer containing reactive unsaturated groups and whose molecular weight
• (M n ) ranges from 225 to 15,000 g/mole, preferably range being from 1,000 to 5,000 g/mole, can be epoxidized using peracids such as peracetic acid, perbenzoic acid, m-chloro perbenzoic acid, most preferably m-chloro perbenzoic acid.
• peracids such as peracetic acid, perbenzoic acid, m-chloro perbenzoic acid, most preferably m-chloro perbenzoic acid.
• Such epoxidized PNB copolymers can be used as multifunctional epoxy material in standard epoxy formulations to obtain a three dimensional insoluble and infusible network.
• epoxidized PNB copolymers can be dissolved in both aromatic and aliphatic di and multifunctional epoxy resins such as
• Epon 828 epoxy phenolic novolac resins, epoxy cresol novolac resins,
• the hardener can be either catalytic or coreactive in nature.
• Catalytic curing agent could be trialkyl amines, boron trifluoride amine complexes and photoinitiated cationic curing agents such as aryldiazonium salts, diaryliodonium salts and onium salts of group VI a elements, especially salts of positively charged sulfur compounds.
• the most preferred catalytic hardener is the boron trifluoride amine complexes.
• Coreactive hardeners can be selected from primary and secondary aliphatic and aromatic amines, such as methylene diamine, diaminodiphenyl sulfone, dicynadiamide, diethylenetriamine,
• triethylenetetramine preferably diaminodiphenyl sulfone, aliphatic and aromatic mercaptans, di and multifunctional isocyanate, di and multifunctional polyester and polyether carboxylic acids and acid anhydrides.
• Selected acid anhydrides are phthalic anhydride, tetrahydrophthalic anhydride, methyl tetrahydrophthalic anhydride, hexahydrophthalic anhydride, nadic methyl anhydride and chlorendic anhydride.
• the epoxy resin containing 10 to 50 weight percent of epoxidized PNB copolymer, the most preferable amount being from 5 to 25 wt.
• PNB copolymer containing materials are phase separated in nature with the domain size of the PNB phase depending on the molecular weight and the functionality of the epoxidized PNB copolymer used.
• the multifunctional epoxy materials of this invention provide crosslinked materials with high glass transition
• Thermosets can also be prepared from the PNB's having pendant unsaturation by heating the homopolymers or copolymers containing pendant vinyl, alkylidene such as ethylidene, fused ring cyclopentenyl, cyclopentenyl and cyclohexeneyl in the presence of a free radical polymerization initiator such as azobisisobutyonitrile, benzoyl peroxide, lauroyl peroxide, t-butylperoxypivalate, t-butylperoxyacetoate, and ⁇ -cumyl peroxyneodecaneoate in an approate solvent.
• Suitable solvents include hydrocarbons, halohydrocarbons, aromatics and haloaromatics.
• the amount of peroxide initiator ranges from about 0.1 to 5.8% by weight after polymer.
• the CPVC polymers suitable for use in the blends of this invention are readily commercially available.
• the chlorine content typically ranges from about 61 to about 72 weight percent, preferably from about 63 to about 68 weight percent.
• the inherent viscosity of the CPVC ranges from about .46 to about 1.2, preferably from about 0.68 to about 0.92.
• the inherent viscosity (I.V.) is a representative measure of the molecular weight of a polymer and is obtained in accordance with ASTM D- 1243-66.
• polycyclic polymers derived from NB-type monomers can be modified by grafting free radical polymerizable monomers forming grafted side chains to or from the polycyclic backbone of the PNB.
• the PNB is dissolved in a common solvent for the PNB and vinyl-type monomer.
• a free radical catalyst initiator is added to the medium and the medium is then heated at elevated temperature to conduct the grafting reaction.
• Suitable solvents include hydrocarbons, halohydrocarbons, aromatics, and haloaromatics.
• Preferred solvents are the aromatics and haloaromatics such as toluene, xylene, benzene, and chlorobenzene.
• the vinyl- type monomer can function as the solvent so long as it can dissolve the PNB. For example, PNB was observed to be soluble in styrene. In this case an additional solvent is not necessary.
• the temperature range of the reaction is from about 80 oC to about 150°C, preferably about 120 oC .
• Suitable catalytic initiators include organic peroxides such as lauroyl peroxide, benzoyl peroxide, diacetyl peroxide, 5-butyl-peroxyneodeconate, t- butylcumyl peroxyneodecanoate, di-n-propyl peroxydicarbonate, di-t-butyl peroxide, and di-sec-butyl-peroxydicarbonate.
• the preferred peroxide is di-t- butyl peroxide.
• vinyl-type monomers are styrenes, acrylates, methacrylates, acrylamides, acrylonitriles, and vinyl monomers.
• the styrenes are selected from compounds of the formula:
• R 10 is hydrogen or methyl
• R 11 independently represents, hydrogen, halogen, linear and branched (C 1 -C 6 ) alkyl, C 6 -C 12 ) alkoxy, (C 6 -C 20 ) aryl, (C 6 -C 20 ) aryloxy, -N(R 12 ) 2 , -SO 2 R 12 , where R 12 independently represents hydrogen, linear, and branched (C 1 -C 10 ) alkyl, and (C 6 -C 12 ) aryl and trifluoromethyl.
• Preferred compounds of the above formula includes styrene and ⁇ -methyl styrene.
• the acrylates and methacrylates are selected from compounds of the formula:
• R 12 is hydrogen, linear, or branched (C 1 -C 5 ) alkyl, (C 6 -C 12 ) alkyl, nitrile, and halogen;
• R 13 is hydrogen, linear, or branched (C 1 -C 20 ) alkyl, (C 1 -C 10 ) hydroxy substituted alkenyl.
• the acrylamides are selected from compounds of the formula:
• R 15 is hydrogen, linear, or branched (C 1 -C 5 ) alkyl, (C 6 -C 12 ) aryl, and halo;
• R 16 independently represents hydrogen, linear, or branched (C 1 -C 5 ) alkyl, and (C 6 -C 12 ) aryl.
• the acrylonitriles are selected from compounds of the formula:
• R 17 is hydrogen, linear, or branched (C 1 -C 5 ) alkyl, (C 6 -C 12 ) aryl, halo, and nitrile.
• the vinyl monomers are selected from compounds of the formula:
• R 18 is hydrogen, Cl, Br, and F, linear or branched (C 1 -C 5 ) alkyl, (C 6 -C 12 ) aryl; and X is Cl, Br, F, linear or branched (C 1 -C 5 ) alkyl, (C 2 -C 20 ) alkenyl, (C 6 -C 12 ) aryl, (C 6 -C 18 aryl ethers, -OAc, aryl ethers, tri (C 1 -C 10 ) alkoxysilanes, and allyl (C 1 -C 10 ) trialkoxysilanes.
• the PNB's containing pendant unsaturation on the PNB backbone enhance the grafting of the free radically polymerized side chains on to the PNB backbone. It is thought that the allylic hydrogen atoms (exclusive of the bridgehead hydrogens) provides an active site for more efficient grafting of the free radically polymerized vinyl- type monomer.
• Another embodiment of this invention concerns a process and polymer composition in which an elastomer is solution blended with norbornene-type monomer(s) in a suitable solvent (i.e., a solvent that dissolves the norbornene- type monomer, the resulting norbornene-type polymer, and the elastomer but does not interfere with the polymerization).
• a suitable solvent i.e., a solvent that dissolves the norbornene- type monomer, the resulting norbornene-type polymer, and the elastomer but does not interfere with the polymerization.
• the norbornene-type monomer is then polymerized by addition of a multicomponent catalyst system comprising a Group VIII transition metal compound in combination with an organoaluminum compound and an optional third component selected from Lewis acids, Br ⁇ nsted acids, and halogenated compounds.
• a multicomponent catalyst system comprising a Group VIII transition metal compound in combination with an organoaluminum compound and an optional third component selected from
• Suitable plasticizers include hydrogenated cyclopentadiene oligomers (sold under the trademark Escorez ® by Exxon Chemicals) and at linear and branched alkane ranging from C 14 -C 34 , most preferably C 24 -C 30 .
• an elastomer is defined as any polymeric material which has a low glass transition temperature (T g ).
• Low glass transition temperature is defined as T g 's below room temperature.
• elastomers include butyl rubber, polyisobutylene, and ethylene/propylene (diene) rubber.
• Other suitable elastomers include polysiloxanes (e.g., polydimethylsiloxane, etc.) and poly(meth)acrylates (e.g., polybutylacrylate, polybutylmethacrylate, etc.).
• Another class of polymers having elastomeric properties which are suitable for forming unreactive in situ blends with norbornene-type polymers are the hydrogenated A-B-A block copolymers of styrene-butadiene-styrene available under the KRATON ® G trademark. These thermoplastic elastomers are especially attractive since they form blends with the norbornene-type polymers of this invention and are transparent due to a very small (i.e., less than the wavelength of visible light) particle size morphology.
• a further embodiment of this invention is a process and composition in which an elastomer containing either pendant unsaturation or end group unsaturation is solution blended with norbornene-type monomer(s) in a suitable solvent (i.e., a solvent that dissolves the monomer and the elastomer but does not interfere with the subsequent polymerization).
• a suitable solvent i.e., a solvent that dissolves the monomer and the elastomer but does not interfere with the subsequent polymerization.
• the norbornene-type monomer is then polymerized by addition of the above-referenced catalyst systems. In this manner a chemical bond is formed between the growing norbornene polymer and the elastomer since the above described catalysts undergo a unique chain transfer reaction forming an A-B comb or di-block copolymer. This process is referred to herein as reactive in situ blending.
• Suitable elastomers include butadiene and isoprene rubber, allyl-terminated polyisobutylene, or ethylene/propylene (diene) rubber, siloxanes all of which can contain either pendant or end group unsaturation.
• Another class of polymers having elastomeric properties which are suitable for forming reactive in-situ blends with the PNB's of this invention are the A-B-A block copolymers of styrene-butadiene-styrene available under the KRATON ® D trademark.
• Suitable unsaturation is defined by those carbon-carbon double bonds which will undergo chain-transfer using the catalysts above described.
• the double bonds include vinyl groups and vinylidene groups.
• a further embodiment of this invention is a process in which a terminal functional PNB macromonomer is copolymerized with an olefin using a suitable Ziegler-Natta catalyst systems to make an A-B comb block copolymer with pendant polynorbornene side blocks.
• a suitable terminal functional PNB includes vinyl -terminated PNB.
• suitable olefin monomers include ethylene, propylene, butene, and longer chain alpha-olefms and mixtures thereof.
• titanium-based catalysts such as TiCl 3 in combination with dieth
• Suitable metallocene catalysts include those catalysts based on Group IV metals (titanium, zirconium, and hafnium) containing one or two cyclopentadienyl ligands that can be unsubstituted, substituted, bridged or unbridged.
• Typical examples include but are not limited to bis(cyclopentadienyl) zirconium dichloride, ethylene-bridged
• Suitable activators include strong neutral Lewis acids and ionic Br ⁇ nsted acids. Examples of the former activators include, but are not limited to, tris(perfluorophenyl)boron, etc. Examples of the latter class of activators include, but are not limited to N,N-dimethyl anilinium
• metallocene catalysts may be used as unsupported or supported catalysts.
• Typical supports include silica or alumina.
• polynorbornenes containing isobutylene-terminal functionality react with isobutylene in the presence of a suitable cationic initiator to form a comb-type A-B block copolymer with polynorbornene pendant side blocks.
• suitable cationic initiators include, but are not limited to, Lewis acids such as ethylaluminum dichloride, aluminum trichloride, boron trichloride, titanium tetrachloride, etc.
• polymers can be chlorinated.
• chlorinated polymers include chlorinated polyethylene and chlorinated polyvinylchloride.
• these polymers are chlorinated by addition of chlorine to the polymer in the presence of UV light or heat in solution, suspension, or in the solid state. Chlorination imparts some desirable properties to the polymers. For example, in the case of polyethylene, chlorination reduces the flammability of the material. In the case of
• chlorination increases the glass transition temperature of the polymer as well as the commercially important heat distortion temperature.
• chlorination of the polymer changes its solubility characteristics and its compatibility with other polymers.
• PNB can be chlorinated.
• Chlorosulfonation of the polycyclic addition polymers is also contemplated in this invention. Typically this is done by addition of chlorine and sulfur dioxide or addition of sulfuryl chloride to the PNB polymer in the presence of UV light or heat.
• one method of compatibilizing two polymers is to add a random copolymer containing comonomer constituents that can form specific interactions with the two or more polymers to be blended. This type of strategy can be followed for the polynorbornenes of the present invention.
• aryl-containing polymer and the phenyl group of the 5-phenylnorbornene of the norbornene copolymer may include, but is not limited to, copolymerization of norbornene with acrylate-functional norbornenes to form blends with chlorinated polymers such as polyvinylchloride.
• chlorinated polymers such as polyvinylchloride.
• the specific interactions between the chlorinated polymers and the acrylate-functional polynorbornene is characterized as dipole-dipole.
• a further example may include, but is not limited to, copolymerization of acid-functional norbornenes with norbornene followed by neutralization with a base such as lithium or magnesium hydroxide to form blends with polyalkylene oxides such as polyethylene oxide or polypropylene oxide.
• the specific interactions between the polyalkylene oxide and the neutralized acid-functional norbornene copolymer is characterized as ion-dipole.
• the grafting is typically accomplished using mechanochemical (such as extrusion), mechanochemical with free-radical initiators, free radical, ionic, and radiation-initiation techniques.
• mechanochemical such as extrusion
• mechanochemical with free-radical initiators free radical, ionic, and radiation-initiation techniques.
• free radical free radical
• ene directly substituting addition
• Diels Alder reaction route may be employed.
• Grafting of maleic anhydride onto polyethylene and polypropylene using solution free radical methods typically use xylene as a solvent and benzoyl peroxide as an initiator and take place between 90 and 130oC , or use refluxing chlorobenzene (or dichlorobenzene) with benzoyl peroxide, t-butyl peroxybenzoate, or di-t-butyl peroxide.
• Literature also shows the subsequent reaction with amines produced detergent additives for lubricants (Shell International, Netherland Patent
• the grafted maleic anhydride content is between 0.1 and-5 wt. %.
• Extrusion grafting typically occurs at typical melt extrusion temperatures for polyethylene and polypropylene (T>200°C) and may also occur in the presence of a free radical initiator. It has been observed that maleic anhydride grafted polypropylene has shown an increased dispersability with Nylon 6 (F. Ide and A. Hasegawa, J. Appl. Polym. Sci., 18(4), 963 (1974)) through reaction of the maleic anhydride moiety on the polypropylene with the nylon amino residues.
• Grafting has been shown to occur for a variety of polymers including polyethylene, polypropylene, ethylene propylene copolymers, polystyrene, polyvinylchloride, polyisobutylene, polyvinylacetals, polyisoprene, polybutadiene, polytetrafluoroethylene, polyacrylates, other poly-alpha-olefins and polymers containing furfuryl residues.
• the polycyclic polymers may be grafted with an unsaturated carboxylic acid or a derivative thereof.
• unsaturated carboxylic acid used herein include acrylic acid, maleic acid, fumaric acid, tetrahydrophthalic acid, itaconic acid, citraconic acid, crotonic acid, isocrotonic acid and nadic acid (endocisbicyclo [2,2,1] hept-5-ene-2,3-dicarboxylic acid).
• the derivatives of the above-mentioned unsaturated carboxylic acids are unsaturated carboxylic acid anhydrides, unsaturated carboxylic acid halides, unsaturated carboxylic acid amides, unsaturated carboxylic acid imides and ester compounds of unsaturated carboxylic acids.
• Concrete examples of these derivatives include maleyl chloride, maleimide, maleic anhydride, citraconic anhydride, monomethyl maleate, dimethyl maleate and glycidyl maleate.
• These graft monomers exemplified above may be used either singly or in combination.
• graft monomers preferred are unsaturated dicarboxylic acids or derivaties thereof, and particularly preferred are maleic acid and nadic acid or acid anhydrides thereof.
• the PNB/succinic anhydride graft copolymers of this invention can be prepared by dissolving the PNB and maleic anhydride in an appropriate solvent.
• Suitable solvents such as hydrocarbons, halohydrocarbons, aromatics and haloaromatics, preferred solvents are the aromatics and haloaromatics such as toluene, xylene, benzene, chlorobenzene, and o-dichlorobenzene.
• the reaction solution is then a sufficient amount of a suitable peroxide initiator.
• Suitable initiators include organic peroxides such as lauroyl peroxide, benzoyl peroxide, diacetyl peroxide, 5-butyl-peroxyneodeconate, t-butylcumyl
• the maleic anhydride is employed in an amount of up to about 10 percent by weight of the PNB polymer. Preferably maleic anhydride is utilized in the range of from about 0.1 to 5 percent by weight of the PNB polymer.
• the grafting reaction is conducted in a temperature range from about 120-C to 220 oC , preferably from 140°C to 200°C, and most preferable from 160 oC to 180°C.
• the PNB/succinic anhydride graft copolymers can be further reacted with polyamides, particularly, amine terminated polyamides, such as, for example, Nylon 66, Nylon 12, and Nylon 6.
• polyamides particularly, amine terminated polyamides, such as, for example, Nylon 66, Nylon 12, and Nylon 6.
• the PNB/MA-polyamide graft copolymer can be formed from solution or reactive extrusion.
• nylon rayon are dissolved in an appropriate solvent or mixture of solvents.
• the reaction medium is heated at a temperature range from about 20°C to about 200°C, preferably about 130°C.
• the maleic anhydride, PNB polymer, and polyamide components can be reactive processed on an extruder, mill or any of the well known thermal mechanical mixing devices commonly used in the plastic compounding industry.
• the components react in the melt to give a PNB/succinic anhydride/polyamide graft copolymer.
• the temperature employed should be above the T g of the PNB, but of course should be below the degradation temperature of the PNB. It will be understood that different homo- and copolymers of PNB will have differing T g 's and degradation temperatures.
• the temperature range employed can be from about 150°C to about 350 oC .
• polymer resins such as amine terminated silicones, amine terminated polypropylene oxides, and amine terminated polybutadienes can be coreacted with the PNB/succinic anhydride graft copolymers of this invention, in a similar manner as discussed hereinabove.
• PNB/succinic anhydride functionality can be coreacted therewith to prepare novel PNB graft copolymers.
• coreactive functional groups that can be reacted on the PNB backbone are as follows:
• Norbornene 150 g was dissolved in 1500 ml of dried dichloroethane. This mixture was degassed and added to a 2 1 stainless steel reactor. The mixture was cooled to 10°C and saturated with ethylene at 250 psig. A dichloroethane solution of [(crotyl)Ni(COD)][PF 6 ] (0.146 g) was added to the mixture.
• the isobutylene-terminated polynorbornene was synthesized in the following manner. Norbornene (5 g) was added to a 100 ml vial equipped with a stir bar, then crimp capped with a septum. To this was added 50 ml of dried dichloroethane. The solution was degassed, cooled to -30°C and isobutylene (5.0 g) was added.
• the solution was transferred to a separator funnel and washed with a saturated aqueous solution of K 2 CO 3 (150 ml). The mixture was allowed to separate over several hours. The THF layer was separated from the aqueous layer and the polymer was isolated by precipitation into MeOH (1000 ml). The polymer was filtered and dried at 80°C under vacuum. The formation of an alcohol-terminated norbornene homopolymer was confirmed by 1H NMR spectroscopy. The methylene protons adjacent to the terminal hydroxyl group resonate at 3.7 ppm.
• Isobutylene-terminated polynorbornene (from Example 3) (1.0 g) was dissolved in 20 ml of toluene and then degassed with argon. Irgafos,
• This example exemplifies the reaction of alcohol-terminated PNB with the isocyanate MDI (methylene diphenyl diisocyanate) as a reaction for incorporation of the alcohol-terminated PNB into a polyurethane formulation.
• MDI methylene diphenyl diisocyanate
• Example 10A
• Norbornene (2.0 g) was dissolved in 30 ml of dichloroethane. The solution was degassed with argon. To this solution was added
• Hexane (70 g) and methylchloride (70 g) were transferred to a reaction vessel and cooled with a dry ice/isopropanol bath.
• 2,6-di-tert-butylpyridine (0.5 ml), 2,4,4,-trimethyl-2-chloropentane (0.23 g), and titanium tetrachloride (3.29 g) were added to the reaction flask.
• Isobutylene (16 g) was transferred to the reaction vessel. The mixture was stirred for 30 min after which time pre-chilled allyltrimethylsilane (3.5 g) was added and stirred for an additional 30 min.
• the vessel contents were then poured into saturated aqueous sodium bicarbonate and the volatiles were allowed to evaporate.
• the polymer product was subjected to Soxhlet extraction using methylene chloride solvent.
• the soluble portion was found to be unreacted allyl-terminated polyisobutylene by NMR.
• the insoluble portion was found to contain polyisobutylene and polynorbornene resonances by NMR, but no allyl end groups were present indicating that a block copolymer was formed.
• the lower molecular weight of this material, relative to the control PNB (Example 11), is consistent with the allyl-terminated PIB being a macromolecular chain transfer agent.
• 0.2 ml of HSbF 6 is added to a dried Teflon ® vial.
• the vial is cooled.
• An equimolar amount of nickel (II) ethylhexanoate (3.15 ml, 8 wt % Ni) is added to the vial, warmed to room temperature and stirred for 2 hours.
• the mixture is stored at -20°C before use.
• MeOH typically 5 ml
• MeOH typically a 3:1 ratio
• This example demonstrates the epoxidation of terminal and pendant unsaturated groups of PNB polymers.
• Determination of full epoxidation relies on disappearance of the double bond resonances associated with the incorporated diene monomer (ENB: 4.8-5.5 ppm; VNB: 4.8-6.0 ppm; DCPD: 5.5-6.0 ppm; CyNB: 5.4-5.7 ppm) or the vinyl-terminated polymers (approximately 5.5-6.0 and 4.8-5.0 ppm). If m-chloro benzoic acid impurities are present in the polymer (as determined by NMR), the polymer is reprecipitated from toluene solution with MeOH until no residual m-chloro benzoic acid is detectable by NMR.
• Example 12 shows that the polymers made in Example 12 above can find utility in blends with CPVC.
• Solution blends of CPVC and epoxidized PNB copolymers were prepared in a mixed solvent system of 1,2-dichloroethane/THF (2: 1 v/v). A 2.0% by weight solution of the blend compositions was prepared and warmed to 50oC overnight to insure complete dissolution and mixing of components.
• Solution blends of CPVC and epoxidized vinyl-terminated norbornene polymers were prepared in a mixed solvent system of THF/cyclohexane (1:1 v/v). A 2.0% by weight solution of the blend compositions was prepared and warmed to 50 °C overnight to insure complete dissolution and mixing of components.
• Solvent-cast films used for evaluation were prepared by applying three coats of the solutions onto clean glass microscope slides with an eye dropper.
• Blend morphology was determined ushg both light and scanning electron microscopic techniques. Light micrographs were obtained at 700X magnification and SEM at 2,500X and 10,000X magnification.
• Blends of CPVC (I.V. 0.68) with epoxidized NB/ENB obtained from Example 16, experiment 2, copolymer (50/50).
• Blends of CPVC (I.V. 0.68) with epoxidized vinyl-terminated polynorbornene obtained from Example 16, experiment 10.
• Solution blends of CPVC and epoxidized PNB copolymers were prepared and tested as in Example 17. The results are set forth in the table below:
• Blends of CPVC (I.V. 0.68) with epoxidized NB/DCPD copolymer (50/50) obtained from Example 16, experiment 12. Solution blends of CPVC and epoxidized PNB copolymers were prepared and tested as in Example 17. The results are set forth in the table below:
• Blends of CPVC (I.V. 0.68) with epoxidized NB/VNB copolymer (50/50) obtained from Example 16, experiment 11. Solution blends of CPVC and epoxidized PNB copolymers were prepared and tested as in Example 17. The results are set forth in the table below:
• This example demonstrates the free radical grafting of a vinyl-type polymer onto a non-functional PNB.
• This example demonstrates the free radical grafting of a vinyl-type polymer onto a PNB having pendant unsaturation.
• This example illustrates the free radical polymerization of a vinyl-type monomer in the presence of a PNB and polymeric impact modifier.
• the flask was further heated to 150°C for 3 hours, cooled, further diluted with toluene and precipitated into methanol to obtain a white polymer, which was dried at 100°C in a vacuum oven. Films cast from the rubber modified material was observed to be translucent indicating phase separated morphology.
• This example demonstrates using a polymer with pendant vinyl groups as chain transfer agent by dissolving the polymer in the hydrocarbon polymerization medium and running a solution and/or suspension polymerization to give a graft copolymer.
• This control experiment was mn under similar conditions to the above illustrative example except that the experiment was ru n in the absence of the polybutadiene, resulting in no chain transfer or grafting and an extremely high molecular weight.
• the polymer was then precipitated with excess ethanol and was washed with excess acetone, filtered and dried ovemight, under vacuum at 80oC to afford the product (2.6 g).
• GPC methods revealed the graft copolymer to possess an M n of 27,000 and an M w of 44,000.
• the polymer was then precipitated with excess ethanol and was washed with excess acetone, filtered and dried overnight, under vacuum at 80°C to afford the graft copolymer (4.1 g) which was found by GPC methods to possess an M n of 39,000 and an M w of 65,000.
• the polymer was precipitated and washed with an excess methanol , filtered and dried ovemight, under vacuum at 80oC .
• the block copolymer was isolated in quantitative yield. Proton NMR methods indicated that the hydride terminated poly(dimethylsiloxane) had reacted to completion and the vinyl terminated poly(norbornene) was also essentially fully converted.
• Hexafluoroantimonic acid (HSbF 6 , 0.45 g, 1.90 mmole) was placed in a dry, nitrogen filled Teflon ® bottle with a Teflon ® cap/valve containing a magnetic stir-bar and the contents were cooled to -27°C. Thereafter was added nickel ethylhexanoate (8% in mineral spirits, 1.90 mmole) and the resulting mixture was allowed to warm to ambient temperature and was then stirred at ambient temperature for 2 hours.
• nickel ethylhexanoate 8% in mineral spirits, 1.90 mmole
• This example illustrates the copolymerization of ethylene and a vinyl terminated PNB to give a comb block copolymer of PNB attached to a backbone of polyethylene.
• the polymer was isolated by filtering through a Buchner funnel. This material was stirred with 10% acidic methanol then refiltered and washed with methanol followed by water. The polymer was vacuum dried overnight at 80 oC (Yield 18.93 g). The formation of this comb block copolymer was confirmed by 1 H NMR spectroscopy after the product was washed with hot chloroform to eliminate any unreacted vinyl terminated polynorbornene.
• the comb block copolymer exhibited resonances at 1.4 ppm (indicating the presence of polyethylene runs) and 0.8-2.5 ppm (indicating the incorporation of the norbornene macromonomer) but was devoid of resonances at 5.0 and 5.8 ppm (indicating the abscence of unreacted vinyl terminated polynorbornene.)
• Chlorobenzene was removed, by heating the sample in a vaccum oven at 120°C for 12 hours followed by further heating to 160°C for 2 hours. Samples were then placed on the microscopy stage for analysis. The magnification on the microscope was 100 times. Two blend samples were prepared. Sample 1 is 90/10 weight % mixture of polynorbornene and PMMA homopolymers that were blended in solution. Two distinct phases, rounded white PMMA phase dispersed in a dark polynorbornene matrix, are clearly visible. The white PMMA phase was observed to be present throughout the sample, with a broad distribution of sizes with a mean of 4.9 ⁇ m and a standard deviation of 4.1 ⁇ m.
• Sample 2 is a blend of sample 1 to which 10 weight % of PNB-g-PMMA had been added in solution.
• the graft copolymer behaving as a polymeric emulsifier increasing the interfacial interaction between the PNB and the PMMA to reduce the domain size.
• the most noticeable change in the micrograph is the uniformity of the
• PMMA domains The size distribution of the PMMA phase was observed to be somewhat narrower, with a mean of 3.7 ⁇ m, standard deviation of 1.6 ⁇ m. This sample was also observed to wet the glass slide much better than the
• Polynorbornene homopolymer was reacted with maleic anhydride (MA) to form grafts of succinic anhydride at various percentages (from 0.3 to 4.2%) in chlorobenzene or o-dichlorobenzene with benzoyl peroxide or di-t-butyl peroxide as initiators under nitrogen purge.
• MA maleic anhydride
• a typical reaction used 16.8 g pnb
• Copolymers of decylnorbornene and norbornene were reacted with maleic anhydride (MA) to form grafts of succinic anhydride in chlorobenzene or o- dichlorobenzene with benzoyl peroxide or di-t-butyl peroxide as initiators under nitrogen atmosphere.
• MA maleic anhydride
• benzoyl peroxide or di-t-butyl peroxide as initiators under nitrogen atmosphere.
• di-t-butyl peroxide was used as an initiator at various temperatures (experiments 4 and 5 in the table below) the viscosities of polymer solutions were low following the reaction and the particle sizes of the polymers after precipitation were small and hard to filter.
• di-t-butyl peroxide was not favored as an initiator for grafting of decylnorbornene copolymers.
• the results (experiments 1, 2, 3, 6, and 7) obtained with benzoyl peroxide as an initiator show that a white powder could be obtained indicating slight, if any, degradation.
• the polynorbornene could be grafted with various amounts of the maleic anhydride. It seems that, unlike homo-polynorbornene systems, benzoyl peroxide is more suitable than di-t-butyl peroxide as an initiator in copolymers containing decylnorbornene.
• the PNB homo- and copolymers and nylon have different solubility parameters.
• a solvent pair was used to dissolve both polymers.
• the reactive blending of grafted polynorbornenes with nylon was performed using a phenol/o- dichlorobenzene solution (30/130, w/w) at 130oC . Since the phenol was also as a nucleophile, nylon was dissolved in reaction mixture first, followed by addition of grafted polynorbornenes to avoid esterification.
• Experiment 5 clearly shows IR evidence of the reaction of the amine terminated nylons for the phthalamide structure (dicarboximide) by a peak at 1710 cm -1 .
• Experiment 5 exhibits mechanical and thermal properties intermediate between the constituents indicating a successful polymer alloy.
• Non-reactive blends exhibited mechanical properties inferior to the constituents.
• the strain to break was observed to be 0.7% for the NB-type polymer, 7.7% for the Nylon 6,6 and 1.7% for the alloy.
• Experiment 6 exhibits the novel characteristic of having mechanical and thermal properties superior to the individual constituents indicating a synergistic alloy.
• the NB polymer was observed to have a strain to break of 0.7%, 3.6% for the Nylon 2, and 6.1% for the alloy.
• Amine terminated silicones were coreacted with maleic anhydride grafted polynorbornene.
• various molecular weights of amine terminated silicones were chosen to toughen the polynorbornene.
• the results of reactions of silicones with grafted polynorbornenes at room temperature with the composition fixed at 10% amine terminated silicone are set forth below. The reactions were allowed to proceed ovemight. Films that were cast from the reaction solution were brittle, but highly transparent. However, the films increased in toughness after heating in the vacuum oven at 130oC . The reaction products which had been dried similarly in the vacuum oven could not be pressed into films, presumably because the drying at elevated temperatures caused some crosslinking.
• An altemative method (experiment 4) was carried out by drying the sample at room temperature under vacuum, then transparent, colorless films and DMA bars could be obtained by pressing the uncured sample at 305 oC .
• a hydrogenated cyclopentadiene (CPD) oligomer (T g 85 oC, M w 480, available under the Escorez trademark, Exxon Chemicals) was blended with polynorbornene homopolymer.
• One gram mixtures of the PNB/CPD oligomer were dissolved in 25 ml chlorobenzene and precipitated in 1000 ml of chilled methanol. Blended samples gave transparent film. The movement of the T g and the transparency of the films suggest that these materials are miscible. Results are set forth below:
• T g of the precipitated Escorez is around 93°C. Samples give transparent films. The movement of the T g and transparency suggest that these materials are miscible.
• Plasticization of PNB (norbornene/decylnorbornene copolymer, 10 mol % decylnorbornene, M w 200,000) by linear alkanes is dependent on the molecular weight of the alkane, and requires decylnorbornene in the base copolymer stmcture. With 20 volume % of the alkane, the following results were observed:
• KRATON ® G / PNB blend polynorbornene homopolymer (M n 209,000) with KRATON ® G (1652), more detailed study showed solution blend of 50% KRATON ® G and 50% PNB and decylnorbornene copolymer gave the unusual result of a transparent film, with domain sizes less than 1 ⁇ m, below the limit of detection with an optical microscope. Closer examination of a cryogenically microtomed sample with TEM using RuO 4 stain indicated a fine stmcture of approximately 15 nm. Tensile properties were indicative of a co- continuous network with a Tensile modulus of 2 Gpa and a strain at break of 7% for the homopolynorbornene blend.
• the polymer was filtered, dissolved in chloroform and stirred over anhydrous magnesium sulfate to remove trace amounts of water, filtered over celite and solvent was removed using a rotovap to obtain a white solid.
• the solid was further dried at 50oC in a vacuum oven. Yield 4.45 g.
• the reaction was confirmed using 1H NMR. The disappearance of the resonance's at 2.7 and 2.9 ppm and the appearance of new resonance's at around 3.3 and 3.5 ppm corresponding to the methylene and the methine protons attached to a hydroxyl group confirms the formation of the diol.
• This example illustrates a reaction between monoalcohol and an acid chloride to give terminal ester functionality.
• M n molecular weight 4000
• the polymer was allowed to dissolve after which 0.34 g (3.75 mmoles) of acryloyl chloride was added, dropwise into the reaction flask.
• the solution was stirred for 10 hours at room temperature after which the polymer was isolated by slowly adding the reaction solution into water.
• the precipitated polymer was filtered, and was transferred into a separator funnel.
• the solution was washed several times with water, followed by aqueous sodium bicarbonate solution.
• the chloroform layer was separated from the aqueous layer, stirred over anhydrous magnesium sulfate and carbon black, filtered over celite and solvent was removed using a rotovap to obtain a light tan color solid.
• the solid was further dried at in a vacuum oven. Yield 1.85g.
• the reaction was confirmed using *H NMR.
• This example demonstrates the grafting of acrylate type monomers on to PNB.
• the precipitated polymer was filtered, washed with methanol and dried at 75oC in a vacuum oven. Yield 0.39 g.
• the reaction for the formation of the urethane linkage was confirmed using 1 H NMR The disappearance of the resonance 3.7 ppm corresponding to the methylene and the methine protons attached to an oxygen, followed by the appearance of new resonance at around 4.2 ppm corresponding to the methylene group attached to an ester, 6.4 corresponding to an amide proton and the aromatic protons appearing at 7.1 and 7.4 ppm's confirms the conversion of the hydroxy groups to the urethane functionality.
• This example illustrates the ability to react amine-functional molecules (e. g., azo dyes) with a maleic anhydride-grafted PNB.
• amine-functional molecules e. g., azo dyes
• a 1.1% maleic anhydride-grafted polynorbornene (5.0 g) was dissolved in 100 mL toluene in a 3 neck 250 ml round bottom flask by heating the sample to 100°C.
• To this solution 48 microliters of aniline was added .
• the solution was allowed to react at 100°C for an additional 45 min.
• About 50 ml of solvent were then removed by simple distillation.
• the solution was cooled to room
• N,N-diethylbydroxylamine (0.35 g) (added as a polymerization inhibitor) were added to a stainless steel reactor. The mixtue was heated to 150°C for 6 hours. The low boiling fraction was removed from the resulting reaction mixture on the roto-vap. The remaining higher boiling fraction was fractionally distilled. The fraction distilling at 130°C @ 4 mm Hg was analyzed by GC and found to be 96% 5-phenylnorbornene.
• Norbornene (4.50 g) and 5-phenylnorbornene (0.90 g) were dissolved in dichloroethane (60 ml). To this degassed solution was added
• Norbornene/phenyl norbornene copolymers containing 4% and 35% phenyl norbornene Blends of the above materials with polystyrene were prepared by dissolving the appropriate norbornene/phenyl norbornene copolymers and polystyrene in chloroform and precipitating the solution of the two polymers in methanol. The precipitated polymers were filtered, dried in a vacuum oven at 120°C for 12 hours, followed by further drying at 180°C for 2 hours.
• phenyl norbornene/norbornene copolymers were blended with polystyrene of two different molecular weights; 5000 g/mole & 95,000.-g/mole in a 75/25 wt. ratio. Miscibility of the two polymers was analyzed using differential scanning calorimetric analysis (DSC). All DSC analysis were performed under nitrogen atmosphere, at a heating rate of 20oC/min. DSC analysis of the norbornene/phenyl norbornene copolymers indicated a single T g , at 391°C for the material containing 4% phenyl norbornene and at 299 oC for the material containing 35% phenyl norbornene.
• DSC differential scanning calorimetric analysis
• the glass transition temperatures for polystyrene of molecular weights 5000 g/mole and 95,000 g/mole were observed to be 96oC and 103oC respectively.
• Chlorination reactions were carried out in a jacketed, cylindrical, ACE-glass reaction flask with a multiport head fitted with a stirrer, Dewar condenser, thermometer well, vacuum port and a gas dip tube. Ultraviolet initiation was obtained using blacklight flourescent circleline lamps which surrounded the reactor.
• the chlorine feed system consisted of a continuosly weighed chlorine lecture bottle connected to the gas dip tube. Chlorine flow was manually controlled with a throttling valve. A high purity nitrogen supply was also connectd to the gas dip tube. The reaction temperature was controlled with a Haake circulating water bath.
• the gaseous hydrochloric acid that formed during the reaction passed through the Dewar uncondensed to a caustic scrubber.
• the reactor contents were purged with nitrogen after reaction to remove excess chlorine to the caustic scrubber.
• the chlorinated polymer was recovered from solution by slow addition to methanol with agitation.
• the precipitated polymer was filtered, washed with methanol, filtered and dried under vacuum at 50-60°C for 24-48 hours. See the table below for details of experiments and analytical results.

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