CA1248674A - Methylmethacrylate/n-phenylmaleimide copolymer- containing polymer alloys - Google Patents
Methylmethacrylate/n-phenylmaleimide copolymer- containing polymer alloysInfo
- Publication number
- CA1248674A CA1248674A CA000465607A CA465607A CA1248674A CA 1248674 A CA1248674 A CA 1248674A CA 000465607 A CA000465607 A CA 000465607A CA 465607 A CA465607 A CA 465607A CA 1248674 A CA1248674 A CA 1248674A
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- CA
- Canada
- Prior art keywords
- polymer
- phenylmaleimide
- styrene
- acrylonitrile
- polymer alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
ABSTRACT
Polymer alloys containing copolymers of methylmethacrylate/N-phenylmaleimide are disclosed. In one embodiment the polymer alloy is an alloy of methylmeth acrylate /N-phenylmaleimide and styrene/acrylonitrile.
In another embodiment, the polymer alloy is an alloy of methylmethacrylate /N-phenylmaleimide and styrene/
acrylonitrile/N-phenylmaleimide.
Polymer alloys containing copolymers of methylmethacrylate/N-phenylmaleimide are disclosed. In one embodiment the polymer alloy is an alloy of methylmeth acrylate /N-phenylmaleimide and styrene/acrylonitrile.
In another embodiment, the polymer alloy is an alloy of methylmethacrylate /N-phenylmaleimide and styrene/
acrylonitrile/N-phenylmaleimide.
Description
8~
MLIII ~ YYLATE/N-P~IENY_L IMIDE
C POL ~ E:R-CONTAINING :I?OL,YI!IER ALLGYS
This invention relates to polymer compositionsO
More specifically, this invention pertains to the discovery of polymers which are fully compatible with one another.
In one of its more specific aspects this invention pertains to polymer alloys comprising Methylmethacrylate /N-phenylmaleimide copolymersO
The incompatibility of polymers with one another is well established. And, cominy up with a workable combi-nation of polymers is still as much luc]c and art as it is science.
In the past, the terms "polymer alloy" and "poly-mer blend" or "polyblend" were used interchangeably.
Technically, and as used herein, the term "polymer alloy"
means a combination of polymers which are fully compatible with one another. Blends, by contrast, are formed by physically combining resins that are less than fully compatible with one another. Typically, the claim of full compatibility of polymers i,e. full miscibility, is shown by total thermodynamic miscibility as determined by glass transition temperature analysis.
According to this invention there is provided a polymer alloy comprising a first and a second polymer wherein, the first polymer is a random copolymer cf recurriny units of methylmethacrylate and recurriny uni~s oE N-phenyl-maleimide and the second polymer is a random copolymer or terpolymer of recurring units of styrene, recurring units d /~
of acrylonitrile and, optionally, recurring units of N-phenyl-maleimide whereby the first and second polymers are fully compatible with one another.
In one embodiment, the polymer alloy is an alloy of a methylmethacrylate/N-phenylmaleimide copolymer with a styrene/acrylonitrile copolymer.
In another embodiment, the polymer alloy i5 an alloy of a methylmethacrylate/N-phenylmaleimide copolymer with a styrene/acrylonitrile/ N-phenylmaleimide terpolymer.
In another embodiment, in order to impart improved impact strength properties, the polymeric material alloyed with the methylmethacrylate/N-phenylmaleimide copolymer, i.e. the styrene/acrylonitrile copolymer or the styrene/
acrylonitrile/N-phenylmaleimide terpolymer, is chemically yrafted to a rubber~ Such materials can be prepared or are commercially availab:Le. Alternatively, the copolymer or terpolyrner grafted tG a rubber can be added as a separa~e component in addition to the styrene/acrylonitrile copolymer or N-phenylmaleimide-containiny terpolymer.
The random methylmethacrylate/N-phenylmaleimide copolymer suitable to produce the polymer alloys of this ln~ention will have a peak molecular weight within the range of from about 100,000 to about 500,000 preferably 250,000 to 350,000. The copolymer can be prepared by a free radical polymerization in solution, in bulk or by suspension. The copolymer will comprise from about 1 to about 50 weight percent N-phenylmaleimide and 99 to 50 weight percent methylmeth-acrylate. Preferably, the copolymer will be prepared by suspension polymerization and will comprise in weight fh~B6~4 percent, 1 to 40 N-phenylmaleimide and ~9 to 60 methylmeth-acrylate.
In order to maintain molecular weightr it is necessary to stabilize the methylmethacrylate/N-phenylmaleimide copolymer prior to any type of the~lal processing, usiny any of the commercially available antioxidants. The preferred antioxidant is an equal weight percent mixture of N, N-diphenyl-p-phenylene diamine and tris(mono and dinonyl)phenyl phosphite. The total amount of antioxidant employed should be within the range of from about 1 to about 2 weiyht percent added to the total weight percent of the polymer alloy The random styrene/acrylonitrile copolymers suitable to produce the polymer alloys of this invention are commercially available and will be selected -to contain, in weight percent, within the range of from about 5 to about 35 recurring units of acrylonitrile, preferably from about 14 to about 30. ~he copolymer should also possess a peak molecular weight within the range of from about 100,000 to about 300,000.
Suitable styrene/acrylonitrile copolymers are commercially available from Monsanto Plastics & Resins Company, a unit of Monsanto Company under the designation Lustran~ SAN Resins. Particularly suitable copolymers are designated Lustran~-31 and Lustran~-33.
Lustran~ SAN 31 Resin contains 23.5 weight percent acrylonitrile and has a peak molecular weight of 128,000.
Lustran~ SAN 33 Resin contains 33.2 weight percent acrylonitrile and has a peak molecular weight of 105,000.
The styrene/acrylonitrile/N-phenylmaleimide terpolymers suitable for use in this invention can also be 7~L
prepared by a free radical polymerization in solution, in bulk or by suspension. The terpolymer will comprise in weight percent, within the range of from about 65 to 73 styrene, 20 to 34 acrylonitrilé and 1 to 7 wei~ht percent N-phenyl-maleimide. The peak molecular weight of the terpolymer should be within the range of from about 100,000 to about 500,000.
Any suitable styrene/acrylonitrile copolymer or N-phenylmaleimide-containing terpolymer grafted to a rubber can be employed to produce a polymer alloy according to this invention.
A particularly suitable styrene/acrylonitrile copolymer yrafted to a rubber is designated Royalene~ PM
1000 Resin, commercially available from Uniroyal Chemical Division of Uniroyal Inc.
Royalene~ PM 1000 Resin is a styrene/acylonitrile copolymer grafted with an EPD~I rubber (S/AN-g-EPDM) (50~50 weight percent) having a styrene matrix acrylonitrile content of about 26 weight percent.
Styrene/acrylonitrile/N phenylmaleimide terpolymers grafted to rubbers are not known to be commercially available.
However, such materials can be prepared using known methods, ror example, the method taught in Example I of U.S. Pat.
3,4~ 22.
Since the polymer alloys of this invention exhibit full miscibility, their polymeric components can be alloyed with one ano-ther in amounts within broad ranges. The polymer alloys of this invention can be comprised of each of their poly~neric components in amounts within the ran~e of from about 1 to 99 weiyht percent based on the total weight of the alloy~ This in turn facilitates the tailoring of their physical properties, to meet khe physical property requirements of any number of end use applications.
Moreover, the polymer alloys of this invention may be prepared using any suitable method of blending.
Preferably, the alloys are prepared by melt mixing at a temperature above the softenin~j points of the alloys using any conventional high shear melt mixing apparatus, including twin screw extruders, single screw extruders and the like.
The polymer alloy extrudate can be chopped into pellets and molded using any conventional molding includiny: injection molding, rotomolding, compression molding and the like.
The word "molding" is meant to encompass all sheet and profile extrusion.
Having described the materials and methods of this invention reference is now made to the following examples which serve to demonstrate the invention.
Example I
This example demonstrates the preparation of a methymethacrylate/N-phenylmaleimide copolymer suitable for use to prepare polymer alloys of this invention.
A citrate bottle was cha~yed with 52.5g of nethylmethacrylate, 17.5g of N-phenylmaleimide, 140g of distilled water, 10 milliliters of a 9~1% (wt.) tricalcium phosphate in water solution as the suspending agent, 0.003g of sodium bisulfite, 0.14g of t-butyl peroc~oate and 0.06g of t-butyl perbenzoate. The citrate bottle was placed in a bottle poly-lnerizer at 95C for 3 hours then 135C for 2 hours. The beads recovered contained 23.5 wt.% N-phenylmaleimide~ exhibited a Tg (C, DSC) of 143 and a peak rnolecular weight of 365,000.
Example II
This example deDIonstrates the preparation of a polymer alloy of this invention.
Five hundred grams of the methylmethacrylate/N-phenylmaleimide copolymer beads prepared in Example I
were melt compounded at about 475F with 500 yrams of styrene/acrylonitrile copolymer pellets (Lustran~ 31 SAN).
Followiny Table I shows physical property values 10 obtained for the methylmethacrylate/N-phenylmaleimide-styrene/acrylonitrile (MMA/NPMI-S/AN) polymer alloy of Example II as compared to the property values separately found for each copolymer component.
TABLE I
~ IMA/NPMI Lustran~ MMA/NPMI-S/AN
Property Unit ASTM ~Example I) SAN 31_ (Example II) Tensilepsi D-6389,3ûO 9,500 10,300 Strength Flexural psiD-790 16,200 16,500 17,400 Strength E'lexural psiD-790560,000 510,000 547,000 Modulus Ty C * 143 109 127 DTUL 1/3,FD--648244 133 217 Notchedft- D-2560.6 0.7 0.6 Izod lbs/in *Glass transition temperature data was obtained by differential scanning calorimetry (DSC) and applied to the Flory-Fox relationship.
Example III
This example demonstrates the preparation of a polymer alloy of this invention.
Five hundred grams of the methylmethacrylate/N-phenylmaleimide copolymer beads prepared in Example I
were melt compounded at about 475F with 500 grams of styrene/acrylonitrile copolymer pellets (Lustran~ 33 SAN).
Following Table II shows physical property values obtained for the methylrnethacrylate/N-phenylmaleimide-styrene/acrylonitrile/ polymer alloy of Example III, as compared to the material property values separately found for each copolymer component.
TABLE II
MklA/NPMI Lustran~ MMA/NPMI S/AN
Property Unit ASTM (Example I) SAN 33 (Example III) Tensilepsi D-6389,300 10,700 10,800 Strength Flexural psiD-790 16,200 17,000 17,300 Strength Flexural psiD-790 560!000 555,000 550,000 Modulus Tg C * 143 109 127 DTUL 1/8,F D-648 244 184 216 Notchedft- D-256 0.6 0.7 0.6 Izod lbs/in *Glass transition temperature data was obtained by differential scanning calorimetry (DSC) and applied to the Flory-Fox relationship.
EXAMPLE IV
This example demonstrates the preparation of a styrene/acylonitrile/N-phenylmaleimide terpolymer suitable for use to prepare polymer alloys of this invention.
A 1 liter resin kettle was charged with 500 grams of styrene and 140 grams of acrylonitrile. The resin kettle was heated to 85C. Immediately on reachiny 85C, dropwise addition of a solution of 60 grams styrene, 15 grams of N-phenylmaleimide and 0.4 grams of ben20yl peroxide was ~.f~
started. The dropwise addition was conducted over 5 hours.
The polymer was recovered by precipitation in methanol.
The overall conversion was 50~ based on total monomer weight~ The terpolyrner has the following composition: 72 styrene, 24% acrylonitrile (IR determination), and 4% N-phenylmaleimide (% N dete~nination). The S/AN/NPMI terpolymer exhibited a Tg ~C, DSC) of 113.5 and a peak molecular weight of 150,000.
Example V
This example serves to demonstrate the complete miscibility of the S/AN/NPMI (72/24/4) terpolymer prepared in E~ample IV with MMA/NPMI copolymers.
A MMA/NPMI copolymer was prepared in accordance with Example I except that the N-phenylmaleimide monomer charge was adjusted to obtain a copolymer having 20% N-phenylmaleimide by weight~
The S/AN/NPMI terpolymer and the MMA/NPMI copolymer were combined by dissolving both in tetrahydrofuran followed by precipitation in methanol. Following Table III shows that the S/AN/NPMI terpolymer is fully miscible with ~MA/NPMI
copolymer.
TABLE III
Tg (C, DSC) MMA/NPMI (80/20) 138.5 S/AN/NPMI (72/24/4) 113.5 50% MMA/NPMI: 50~ S/AN/NPMI 125.5 The data of Table III serve to show that a polymer alloy of MMA/NPMI with terpolymers of S/AN/NPMI, would inherently e~hibit improved heat resistance due to the higher glass transition temperatures of -the terpolymer as compared ~2~
to a styrene/acrylonitrile copolymer.
Example VI
This example demonstrates the preparation of a polymer alloy of this inventior. which employs a styrene/
acrylonitrile-g-EPDM copolymer.
Six hundred eighty grams of the MMA/NPMI copolymer beads prepared in Example I were melt compounded at about 480F with 320 grams of Royalene~ PM 1000 Resin copolymer pellets.
Following Table IV shows the physical property values obtained for the polymer alloy.
TABLE IV
M~A/NPMI-S/AN-g-EPDM
Tensile Strength (psi~7,440 Flex Strength (psi)11,800 Flex Modulus (psi)325,000 Tg ~C, DSC) 135 DTUL (1/8", F) 221 Gardner Falling Weight208 Index (Ft-lbs/irl) Notched Izod ~ft-lbs/in)4.5 The above data in Tables I-IV serve to show that polymer alloys of this invention exhibit certain physical properties which are good median properties and certain other physical properties which are better than the weighted averages of the base polymers.
It will be evident from the foreyoiny that various modifications can be made to this invention. Such, however, are considered to be within the scope of this invention.
_g_
MLIII ~ YYLATE/N-P~IENY_L IMIDE
C POL ~ E:R-CONTAINING :I?OL,YI!IER ALLGYS
This invention relates to polymer compositionsO
More specifically, this invention pertains to the discovery of polymers which are fully compatible with one another.
In one of its more specific aspects this invention pertains to polymer alloys comprising Methylmethacrylate /N-phenylmaleimide copolymersO
The incompatibility of polymers with one another is well established. And, cominy up with a workable combi-nation of polymers is still as much luc]c and art as it is science.
In the past, the terms "polymer alloy" and "poly-mer blend" or "polyblend" were used interchangeably.
Technically, and as used herein, the term "polymer alloy"
means a combination of polymers which are fully compatible with one another. Blends, by contrast, are formed by physically combining resins that are less than fully compatible with one another. Typically, the claim of full compatibility of polymers i,e. full miscibility, is shown by total thermodynamic miscibility as determined by glass transition temperature analysis.
According to this invention there is provided a polymer alloy comprising a first and a second polymer wherein, the first polymer is a random copolymer cf recurriny units of methylmethacrylate and recurriny uni~s oE N-phenyl-maleimide and the second polymer is a random copolymer or terpolymer of recurring units of styrene, recurring units d /~
of acrylonitrile and, optionally, recurring units of N-phenyl-maleimide whereby the first and second polymers are fully compatible with one another.
In one embodiment, the polymer alloy is an alloy of a methylmethacrylate/N-phenylmaleimide copolymer with a styrene/acrylonitrile copolymer.
In another embodiment, the polymer alloy i5 an alloy of a methylmethacrylate/N-phenylmaleimide copolymer with a styrene/acrylonitrile/ N-phenylmaleimide terpolymer.
In another embodiment, in order to impart improved impact strength properties, the polymeric material alloyed with the methylmethacrylate/N-phenylmaleimide copolymer, i.e. the styrene/acrylonitrile copolymer or the styrene/
acrylonitrile/N-phenylmaleimide terpolymer, is chemically yrafted to a rubber~ Such materials can be prepared or are commercially availab:Le. Alternatively, the copolymer or terpolyrner grafted tG a rubber can be added as a separa~e component in addition to the styrene/acrylonitrile copolymer or N-phenylmaleimide-containiny terpolymer.
The random methylmethacrylate/N-phenylmaleimide copolymer suitable to produce the polymer alloys of this ln~ention will have a peak molecular weight within the range of from about 100,000 to about 500,000 preferably 250,000 to 350,000. The copolymer can be prepared by a free radical polymerization in solution, in bulk or by suspension. The copolymer will comprise from about 1 to about 50 weight percent N-phenylmaleimide and 99 to 50 weight percent methylmeth-acrylate. Preferably, the copolymer will be prepared by suspension polymerization and will comprise in weight fh~B6~4 percent, 1 to 40 N-phenylmaleimide and ~9 to 60 methylmeth-acrylate.
In order to maintain molecular weightr it is necessary to stabilize the methylmethacrylate/N-phenylmaleimide copolymer prior to any type of the~lal processing, usiny any of the commercially available antioxidants. The preferred antioxidant is an equal weight percent mixture of N, N-diphenyl-p-phenylene diamine and tris(mono and dinonyl)phenyl phosphite. The total amount of antioxidant employed should be within the range of from about 1 to about 2 weiyht percent added to the total weight percent of the polymer alloy The random styrene/acrylonitrile copolymers suitable to produce the polymer alloys of this invention are commercially available and will be selected -to contain, in weight percent, within the range of from about 5 to about 35 recurring units of acrylonitrile, preferably from about 14 to about 30. ~he copolymer should also possess a peak molecular weight within the range of from about 100,000 to about 300,000.
Suitable styrene/acrylonitrile copolymers are commercially available from Monsanto Plastics & Resins Company, a unit of Monsanto Company under the designation Lustran~ SAN Resins. Particularly suitable copolymers are designated Lustran~-31 and Lustran~-33.
Lustran~ SAN 31 Resin contains 23.5 weight percent acrylonitrile and has a peak molecular weight of 128,000.
Lustran~ SAN 33 Resin contains 33.2 weight percent acrylonitrile and has a peak molecular weight of 105,000.
The styrene/acrylonitrile/N-phenylmaleimide terpolymers suitable for use in this invention can also be 7~L
prepared by a free radical polymerization in solution, in bulk or by suspension. The terpolymer will comprise in weight percent, within the range of from about 65 to 73 styrene, 20 to 34 acrylonitrilé and 1 to 7 wei~ht percent N-phenyl-maleimide. The peak molecular weight of the terpolymer should be within the range of from about 100,000 to about 500,000.
Any suitable styrene/acrylonitrile copolymer or N-phenylmaleimide-containing terpolymer grafted to a rubber can be employed to produce a polymer alloy according to this invention.
A particularly suitable styrene/acrylonitrile copolymer yrafted to a rubber is designated Royalene~ PM
1000 Resin, commercially available from Uniroyal Chemical Division of Uniroyal Inc.
Royalene~ PM 1000 Resin is a styrene/acylonitrile copolymer grafted with an EPD~I rubber (S/AN-g-EPDM) (50~50 weight percent) having a styrene matrix acrylonitrile content of about 26 weight percent.
Styrene/acrylonitrile/N phenylmaleimide terpolymers grafted to rubbers are not known to be commercially available.
However, such materials can be prepared using known methods, ror example, the method taught in Example I of U.S. Pat.
3,4~ 22.
Since the polymer alloys of this invention exhibit full miscibility, their polymeric components can be alloyed with one ano-ther in amounts within broad ranges. The polymer alloys of this invention can be comprised of each of their poly~neric components in amounts within the ran~e of from about 1 to 99 weiyht percent based on the total weight of the alloy~ This in turn facilitates the tailoring of their physical properties, to meet khe physical property requirements of any number of end use applications.
Moreover, the polymer alloys of this invention may be prepared using any suitable method of blending.
Preferably, the alloys are prepared by melt mixing at a temperature above the softenin~j points of the alloys using any conventional high shear melt mixing apparatus, including twin screw extruders, single screw extruders and the like.
The polymer alloy extrudate can be chopped into pellets and molded using any conventional molding includiny: injection molding, rotomolding, compression molding and the like.
The word "molding" is meant to encompass all sheet and profile extrusion.
Having described the materials and methods of this invention reference is now made to the following examples which serve to demonstrate the invention.
Example I
This example demonstrates the preparation of a methymethacrylate/N-phenylmaleimide copolymer suitable for use to prepare polymer alloys of this invention.
A citrate bottle was cha~yed with 52.5g of nethylmethacrylate, 17.5g of N-phenylmaleimide, 140g of distilled water, 10 milliliters of a 9~1% (wt.) tricalcium phosphate in water solution as the suspending agent, 0.003g of sodium bisulfite, 0.14g of t-butyl peroc~oate and 0.06g of t-butyl perbenzoate. The citrate bottle was placed in a bottle poly-lnerizer at 95C for 3 hours then 135C for 2 hours. The beads recovered contained 23.5 wt.% N-phenylmaleimide~ exhibited a Tg (C, DSC) of 143 and a peak rnolecular weight of 365,000.
Example II
This example deDIonstrates the preparation of a polymer alloy of this invention.
Five hundred grams of the methylmethacrylate/N-phenylmaleimide copolymer beads prepared in Example I
were melt compounded at about 475F with 500 yrams of styrene/acrylonitrile copolymer pellets (Lustran~ 31 SAN).
Followiny Table I shows physical property values 10 obtained for the methylmethacrylate/N-phenylmaleimide-styrene/acrylonitrile (MMA/NPMI-S/AN) polymer alloy of Example II as compared to the property values separately found for each copolymer component.
TABLE I
~ IMA/NPMI Lustran~ MMA/NPMI-S/AN
Property Unit ASTM ~Example I) SAN 31_ (Example II) Tensilepsi D-6389,3ûO 9,500 10,300 Strength Flexural psiD-790 16,200 16,500 17,400 Strength E'lexural psiD-790560,000 510,000 547,000 Modulus Ty C * 143 109 127 DTUL 1/3,FD--648244 133 217 Notchedft- D-2560.6 0.7 0.6 Izod lbs/in *Glass transition temperature data was obtained by differential scanning calorimetry (DSC) and applied to the Flory-Fox relationship.
Example III
This example demonstrates the preparation of a polymer alloy of this invention.
Five hundred grams of the methylmethacrylate/N-phenylmaleimide copolymer beads prepared in Example I
were melt compounded at about 475F with 500 grams of styrene/acrylonitrile copolymer pellets (Lustran~ 33 SAN).
Following Table II shows physical property values obtained for the methylrnethacrylate/N-phenylmaleimide-styrene/acrylonitrile/ polymer alloy of Example III, as compared to the material property values separately found for each copolymer component.
TABLE II
MklA/NPMI Lustran~ MMA/NPMI S/AN
Property Unit ASTM (Example I) SAN 33 (Example III) Tensilepsi D-6389,300 10,700 10,800 Strength Flexural psiD-790 16,200 17,000 17,300 Strength Flexural psiD-790 560!000 555,000 550,000 Modulus Tg C * 143 109 127 DTUL 1/8,F D-648 244 184 216 Notchedft- D-256 0.6 0.7 0.6 Izod lbs/in *Glass transition temperature data was obtained by differential scanning calorimetry (DSC) and applied to the Flory-Fox relationship.
EXAMPLE IV
This example demonstrates the preparation of a styrene/acylonitrile/N-phenylmaleimide terpolymer suitable for use to prepare polymer alloys of this invention.
A 1 liter resin kettle was charged with 500 grams of styrene and 140 grams of acrylonitrile. The resin kettle was heated to 85C. Immediately on reachiny 85C, dropwise addition of a solution of 60 grams styrene, 15 grams of N-phenylmaleimide and 0.4 grams of ben20yl peroxide was ~.f~
started. The dropwise addition was conducted over 5 hours.
The polymer was recovered by precipitation in methanol.
The overall conversion was 50~ based on total monomer weight~ The terpolyrner has the following composition: 72 styrene, 24% acrylonitrile (IR determination), and 4% N-phenylmaleimide (% N dete~nination). The S/AN/NPMI terpolymer exhibited a Tg ~C, DSC) of 113.5 and a peak molecular weight of 150,000.
Example V
This example serves to demonstrate the complete miscibility of the S/AN/NPMI (72/24/4) terpolymer prepared in E~ample IV with MMA/NPMI copolymers.
A MMA/NPMI copolymer was prepared in accordance with Example I except that the N-phenylmaleimide monomer charge was adjusted to obtain a copolymer having 20% N-phenylmaleimide by weight~
The S/AN/NPMI terpolymer and the MMA/NPMI copolymer were combined by dissolving both in tetrahydrofuran followed by precipitation in methanol. Following Table III shows that the S/AN/NPMI terpolymer is fully miscible with ~MA/NPMI
copolymer.
TABLE III
Tg (C, DSC) MMA/NPMI (80/20) 138.5 S/AN/NPMI (72/24/4) 113.5 50% MMA/NPMI: 50~ S/AN/NPMI 125.5 The data of Table III serve to show that a polymer alloy of MMA/NPMI with terpolymers of S/AN/NPMI, would inherently e~hibit improved heat resistance due to the higher glass transition temperatures of -the terpolymer as compared ~2~
to a styrene/acrylonitrile copolymer.
Example VI
This example demonstrates the preparation of a polymer alloy of this inventior. which employs a styrene/
acrylonitrile-g-EPDM copolymer.
Six hundred eighty grams of the MMA/NPMI copolymer beads prepared in Example I were melt compounded at about 480F with 320 grams of Royalene~ PM 1000 Resin copolymer pellets.
Following Table IV shows the physical property values obtained for the polymer alloy.
TABLE IV
M~A/NPMI-S/AN-g-EPDM
Tensile Strength (psi~7,440 Flex Strength (psi)11,800 Flex Modulus (psi)325,000 Tg ~C, DSC) 135 DTUL (1/8", F) 221 Gardner Falling Weight208 Index (Ft-lbs/irl) Notched Izod ~ft-lbs/in)4.5 The above data in Tables I-IV serve to show that polymer alloys of this invention exhibit certain physical properties which are good median properties and certain other physical properties which are better than the weighted averages of the base polymers.
It will be evident from the foreyoiny that various modifications can be made to this invention. Such, however, are considered to be within the scope of this invention.
_g_
Claims (15)
1. A polymer alloy comprising a first and a second polymer wherein, (a) the first polymer is a random copolymer of recurring units of methylmethacrylate and recurring units of N-phenylmaleimide; and (b) the second polymer is a random copolymer or terpolymer of recurring units of styrene, recurring units of acrylonitrile, and, optionally, recurring units of N-phenylmaleimide.
2. The polymer alloy of claim 1 in which said second polymer is a random copolymer of styrene/acrylonitrile.
3. A polymer alloy of claim 1 in which said second polymer is a random terpolymer of styrene/acrylonitrile/N-phenylmaleimide.
4. The polymer alloy of claim 1 in which said second polymer is chemically grafted to a rubber.
5. The polymer alloy of claim 1 comprising a random copolymer of styrene/acrylonitrile chemically grafted to a rubber.
6. The polymer alloy of claim 1 comprising a random terpolymer of styrene/acrylonitrile/N-phenylmaleimide chemically grafted to a rubber.
7. The polymer alloy of claim 1 in which said first polymer is present in an amount within the range of from about 1 to 99 weight percent based on the total weight of the polymer alloy.
8. The polymer alloy of claim 1 in which said second polymer is present in an amount within the range of from about 1 to 99 weight percent based on the total weight from about 1 to 99 weight percent based on the total weight of the polymer alloy.
9. The polymer alloy of claim 1, in which said first polymer comprises from about 1 to about 50 weight percent N-phenylmaleimide.
10. The polymer alloy of claim 1 in which said first polymer comprises from about 99 to about 50 weight percent methylmethacrylate.
11. The polymer alloy of claim 2 in which said second polymer comprises from about 5 to about 35 weight percent acrylonitrile and from about 95 to about 65 weight percent styrene.
12. The polymer alloy of claim 3 in which said second polymer comprises from about 65 to about 73 weight percent styrene, from about 20 to about 34 weight percent acrylonitrile and from about 1 to about 7 weight percent N-phenylmaleimide.
13. The polymer alloy of claim 1 in the form of a molded article.
14. A method of producing a molded article which comprises:
(a) preparing a polymer alloy comprising a first and a second polymer wherein, (i) the first polymer is a random copolymer of recurring units of methylmethacrylate and recurring units of N-phenylmaleimide; and (ii) the second polymer is a random copolymer or terpolymer of recurring units of styrene, recurring units of acrylonitrile, and, optionally, recurring units of N-phenylmaleimide; and (b) molding the resulting polymer alloy.
(a) preparing a polymer alloy comprising a first and a second polymer wherein, (i) the first polymer is a random copolymer of recurring units of methylmethacrylate and recurring units of N-phenylmaleimide; and (ii) the second polymer is a random copolymer or terpolymer of recurring units of styrene, recurring units of acrylonitrile, and, optionally, recurring units of N-phenylmaleimide; and (b) molding the resulting polymer alloy.
15. A molded polymer alloy produced according to the method of claim 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000465607A CA1248674A (en) | 1984-10-17 | 1984-10-17 | Methylmethacrylate/n-phenylmaleimide copolymer- containing polymer alloys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000465607A CA1248674A (en) | 1984-10-17 | 1984-10-17 | Methylmethacrylate/n-phenylmaleimide copolymer- containing polymer alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1248674A true CA1248674A (en) | 1989-01-10 |
Family
ID=4128933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000465607A Expired CA1248674A (en) | 1984-10-17 | 1984-10-17 | Methylmethacrylate/n-phenylmaleimide copolymer- containing polymer alloys |
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| CA (1) | CA1248674A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114927279A (en) * | 2022-06-01 | 2022-08-19 | 湖南湘江电缆有限公司 | High-temperature-resistant waterproof environment-friendly cable |
-
1984
- 1984-10-17 CA CA000465607A patent/CA1248674A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114927279A (en) * | 2022-06-01 | 2022-08-19 | 湖南湘江电缆有限公司 | High-temperature-resistant waterproof environment-friendly cable |
| CN114927279B (en) * | 2022-06-01 | 2023-03-31 | 湖南湘江电缆有限公司 | High-temperature-resistant waterproof environment-friendly cable |
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