WO2011040184A1 - 液晶性高分子及び成形体 - Google Patents
液晶性高分子及び成形体 Download PDFInfo
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- WO2011040184A1 WO2011040184A1 PCT/JP2010/065149 JP2010065149W WO2011040184A1 WO 2011040184 A1 WO2011040184 A1 WO 2011040184A1 JP 2010065149 W JP2010065149 W JP 2010065149W WO 2011040184 A1 WO2011040184 A1 WO 2011040184A1
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- Prior art keywords
- monomer
- acid
- liquid crystalline
- crystalline polymer
- molecular structure
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- 229920000106 Liquid crystal polymer Polymers 0.000 title claims abstract description 74
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 title abstract description 5
- 239000000178 monomer Substances 0.000 claims abstract description 116
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- KAUQJMHLAFIZDU-UHFFFAOYSA-N 6-Hydroxy-2-naphthoic acid Chemical compound C1=C(O)C=CC2=CC(C(=O)O)=CC=C21 KAUQJMHLAFIZDU-UHFFFAOYSA-N 0.000 claims abstract description 22
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- JTGCXYYDAVPSFD-UHFFFAOYSA-N 4-(4-hydroxyphenyl)benzoic acid Chemical compound C1=CC(C(=O)O)=CC=C1C1=CC=C(O)C=C1 JTGCXYYDAVPSFD-UHFFFAOYSA-N 0.000 claims abstract description 6
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- 238000002844 melting Methods 0.000 claims description 27
- 230000008018 melting Effects 0.000 claims description 27
- IJFXRHURBJZNAO-UHFFFAOYSA-N 3-hydroxybenzoic acid Chemical group OC(=O)C1=CC=CC(O)=C1 IJFXRHURBJZNAO-UHFFFAOYSA-N 0.000 claims description 18
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- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- WKOLLVMJNQIZCI-UHFFFAOYSA-N vanillic acid Chemical compound COC1=CC(C(O)=O)=CC=C1O WKOLLVMJNQIZCI-UHFFFAOYSA-N 0.000 description 1
- TUUBOHWZSQXCSW-UHFFFAOYSA-N vanillic acid Natural products COC1=CC(O)=CC(C(O)=O)=C1 TUUBOHWZSQXCSW-UHFFFAOYSA-N 0.000 description 1
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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
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/38—Polymers
- C09K19/3804—Polymers with mesogenic groups in the main chain
- C09K19/3809—Polyesters; Polyester derivatives, e.g. polyamides
-
- 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
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/06—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids
- C08G63/065—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids the hydroxy and carboxylic ester groups being bound to aromatic rings
-
- 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
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/60—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from the reaction of a mixture of hydroxy carboxylic acids, polycarboxylic acids and polyhydroxy compounds
- C08G63/605—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from the reaction of a mixture of hydroxy carboxylic acids, polycarboxylic acids and polyhydroxy compounds the hydroxy and carboxylic groups being bound to aromatic rings
-
- 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
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/38—Polymers
Definitions
- the present invention relates to a liquid crystalline polymer having high thermal conductivity and a molded body formed by molding the liquid crystalline polymer.
- a liquid crystalline polymer capable of forming an anisotropic molten phase is known as a material that is excellent in dimensional accuracy and vibration damping properties among thermoplastic resins, and generates very little burrs during molding. Conventionally, taking advantage of such characteristics, liquid crystalline polymers have been widely used as materials for various electric and electronic parts.
- Patent Document 1 As a method for increasing the thermal conductivity of a molded body, a method for improving moldability and thermal conductivity by adding alumina having a specific particle diameter to a thermoplastic resin is disclosed (Patent Document 1). It is said that high thermal conductivity (heat dissipation) can be imparted to the molded body by including alumina with high thermal conductivity in the thermoplastic resin as a filler.
- thermoplastic resin composition in which graphite is mixed with a thermoplastic resin is molded to obtain a molded body having thermal conductivity (Patent Document 2).
- Patent Document 2 a method has been proposed in which a thermoplastic resin composition in which graphite is mixed with a thermoplastic resin is molded to obtain a molded body having thermal conductivity.
- thermoplastic resin with high heat conductivity As described above, a technique of blending a highly heat-conductive filler into a resin material is generally known. However, if a thermoplastic resin with high heat conductivity is developed, the heat conductivity of the molded body is further increased. Can be increased. As described above, the liquid crystalline polymer is known as an excellent material among thermoplastic resins that has excellent dimensional accuracy and vibration damping properties, and generates very little burrs during molding. For this reason, a liquid crystalline polymer having high thermal conductivity is particularly demanded.
- a liquid crystalline polymer having high thermal conductivity is required to increase the thermal conductivity of the molded body. Furthermore, in order to be preferably applied as a material for actual parts, the physical properties of the molded body other than the thermal conductivity, such as the ease of production of liquid crystalline polymers such as being capable of melt polymerization and the high mechanical strength of the molded body It is also necessary to consider.
- the present invention has been made in order to solve the above-described problems, and an object of the present invention is to mold a liquid crystalline polymer having high thermal conductivity, which is easy to produce, and a liquid crystalline resin composition containing the liquid crystalline polymer.
- an object of the present invention is to provide a molded body having high mechanical properties.
- the inventors of the present invention have made extensive studies to solve the above problems.
- a monomer having an asymmetric molecular structure was polymerized, the melting enthalpy ⁇ H measured by DSC was 2.0 J / g or more and 10 J / g or less, and the intrinsic viscosity (IV) was 5 dL /
- IV intrinsic viscosity
- a monomer having an asymmetric molecular structure is polymerized, the melting enthalpy ⁇ H measured by DSC is 2.0 J / g or more and 10 J / g or less, and the intrinsic viscosity (IV) is 5 dL / a liquid crystalline polymer having a molecular weight of g to 7 dL / g.
- Monomers having the asymmetric molecular structure include 4-hydroxybenzoic acid (4-HBA), 6-hydroxy-2-naphthoic acid (HNA), N-acetyl-aminobenzoic acid (ABA), and 4- The liquid crystalline polymer according to (1), which is at least one selected from the group consisting of hydroxy-4′-biphenylcarboxylic acid (HBCA).
- 4-hydroxybenzoic acid (4-HBA)
- HNA 6-hydroxy-2-naphthoic acid
- ABA N-acetyl-aminobenzoic acid
- HBCA hydroxy-4′-biphenylcarboxylic acid
- the liquid crystalline polymer of the present invention has a melting enthalpy ⁇ H measured by DSC of 2.0 J / g or more and 10 J / g or less, and the average interplanar spacing is 4.0 mm or more and 4.5 mm or less.
- the molded article of the present invention can achieve both high thermal conductivity and sufficient mechanical strength.
- the liquid crystalline polymer of the present invention has an intrinsic viscosity (IV) of 5 dL / g or more and 7 dL / g or less. Therefore, the liquid crystalline polymer of the present invention is suitable for production by a melt polymerization method. As a result, the molded body can be easily manufactured.
- IV intrinsic viscosity
- (A) is a diagram showing a case where the molecular skeleton is symmetric but takes an asymmetric molecular structure when considering substituents, and (b) shows a case where the molecular skeleton itself is asymmetric, resulting in an asymmetric molecular structure.
- (c) is a figure for demonstrating a molecular skeleton. It is a figure for demonstrating the case where aromatic is a benzene ring about a kink structure. It is a figure for demonstrating the case where aromatic is a naphthalene ring about a kink structure.
- the liquid crystalline polymer of the present invention is obtained by polymerizing a monomer having an asymmetric molecular structure, has a melting enthalpy ⁇ H measured by DSC of 2.0 J / g or more and 10 J / g or less, and has an intrinsic viscosity (IV .) Is 5 dL / g or more and 7 dL / g or less.
- the liquid crystalline polymer refers to a melt processable polymer having a property capable of forming an optically anisotropic molten phase.
- the property of the anisotropic molten phase can be confirmed by a conventional polarization inspection method using an orthogonal polarizer. More specifically, the anisotropic molten phase can be confirmed by using a Leitz polarizing microscope and observing a molten sample placed on a Leitz hot stage under a nitrogen atmosphere at a magnification of 40 times.
- polarized light is normally transmitted even in a molten stationary state and optically anisotropic.
- the liquid crystalline polymer of the present invention is obtained by polymerizing a monomer having an asymmetric molecular structure.
- Examples thereof include liquid crystalline polymers as shown in the following (1) to (4).
- a polyester composed of one or more of aromatic hydroxycarboxylic acid and its derivatives mainly having an asymmetric molecular structure.
- the present invention is characterized by using a monomer having an asymmetric molecular structure.
- the asymmetric molecular structure is as shown in FIG. 1 (b) when the molecular skeleton is symmetrical as shown in FIG. 1 (a), but the molecular structure becomes asymmetric when the substituents (R 1 , R 2 ) are taken into consideration.
- R is a substituent
- the position of the substituent is also considered as the molecular skeleton.
- FIG. 1 (c) is a molecular skeleton.
- the monomer having an asymmetric molecular structure preferably contains a certain amount of a monomer having a kink structure.
- the kink structure refers to a monomer that changes the molecular chain direction (direction in which the monomers are linked) in the liquid crystalline polymer.
- the kink structure will be further described using an example in which the aromatic is a benzene ring.
- a polymer is formed by combining with other monomers at a portion having a hydroxy group or a carboxyl group. Therefore, the monomer having a structure in which the positional relationship between the hydroxy group and the carboxyl group is as shown in FIG. 2A is a kink structure monomer. This is because, as shown in FIG. 2 (b), the monomer can change the direction in which the monomers continue from arrow a1 to arrow a2.
- a monomer having a structure as shown in FIG. 2C is also a kink-structured monomer. This is because, as shown in FIG.
- the monomer can change the direction in which the monomers continue from arrow a3 to arrow a4.
- a monomer having a structure as shown in FIG. 2 (e) is not a kink-structured monomer. This is because, as shown in FIG. 2 (f), the direction in which the monomers are continuous remains unchanged as indicated by the arrow a5.
- a monomer having a structure in which the positional relationship between the hydroxy group and the carboxyl group is as shown in FIG. 3A is a kink structure monomer. This is because, as shown in FIG. 3B, the monomer can be changed from the arrow b1 to the arrow b2 in the direction in which the monomers are continuous. Although it can be considered that the arrow b1 and the arrow b2 are in the same direction, as shown in FIG. 3C, the direction in which the monomers are connected is translated by ⁇ b.
- a monomer having a structure as shown in FIG. 3D is also a kink-structured monomer. This is because, as shown in FIG. 3E, the monomer can change the direction in which the monomers are continuous from the arrow b3 to the arrow b4.
- a monomer having a structure as shown in FIG. 3F is also a kink-structured monomer. This is because, as shown in FIG. 3G, the monomer can change the direction in which the monomers continue from arrow b5 to arrow b6.
- a monomer having a structure as shown in FIG. 3 (h) is not a kink structure monomer. This is because, as shown in FIG. 3 (i), the direction in which the monomers are continuous remains unchanged in the direction of the arrow b7.
- aromatic hydroxycarboxylic acids having an asymmetric molecular structure can be used.
- examples of the aromatic hydroxycarboxylic acid include hydroxybenzoic acid and ester derivatives thereof, and hydroxynaphthoic acid and ester derivatives thereof. More specifically, the following compounds can be mentioned.
- Hydroxybenzoic acid such as 4-hydroxybenzoic acid, 3-hydroxybenzoic acid; Alkyl-substituted products of hydroxybenzoic acid such as 3-methyl-4-hydroxybenzoic acid, 3,5-dimethyl-4-hydroxybenzoic acid, 2,6-dimethyl-4-hydroxybenzoic acid; Alkoxy-substituted products of hydroxybenzoic acid such as 3-methoxy-4-hydroxybenzoic acid and 3,5-dimethoxy-4-hydroxybenzoic acid; 3-chloro-4-hydroxybenzoic acid, 2-chloro-4-hydroxybenzoic acid, 2,3-dichloro-4-hydroxybenzoic acid, 3,5-dichloro-4-hydroxybenzoic acid, 2,5-dichloro- Halogenated products of hydroxybenzoic acid such as 4-hydroxybenzoic acid and 3-bromo-4-hydroxybenzoic acid; Hydroxynaphthoic acids such as 6-hydroxy-2-naphthoic acid, 7-hydroxy-2-naphthoic acid
- compounds having a kink structure are 3-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, 7-hydroxy-2-naphthoic acid, 6-hydroxy-1-naphthoic acid, 6-hydroxy- 5-methyl-2-naphthoic acid, 6-hydroxy-5-methoxy-2-naphthoic acid, 6-hydroxy-5-chloro-2-naphthoic acid, 6-hydroxy-7-chloro-2-naphthoic acid, 6- Hydroxy-5,7-dichloro-2-naphthoic acid.
- Aromatic dicarboxylic acid, alicyclic dicarboxylic acid and derivatives thereof having an asymmetric molecular structure will be described in the order of aromatic dicarboxylic acid and alicyclic dicarboxylic acid.
- the aromatic dicarboxylic acid only needs to have an asymmetric molecular structure.
- the asymmetric molecular structure has the same meaning as described above.
- the monomer having an asymmetric molecular structure preferably contains a certain amount of a monomer having a kink structure.
- the kink structure refers to a monomer that changes the molecular chain direction (direction in which the monomers are linked) in the liquid crystalline polymer.
- the kink structure is also synonymous with that described above.
- the case where the aromatic is a benzene ring will be briefly described.
- the kink structure will be further described using an example in which the aromatic is a benzene ring.
- an aromatic dicarboxylic acid a polymer is formed by bonding with another monomer at a portion where two carboxyl groups are present. Therefore, the monomer having a structure in which the positional relationship between the two carboxyl groups is as shown in FIGS. 4A and 4B has a kink structure.
- the direction in which the monomers are continuous can be changed from the arrow c1 to the arrow c2 (see FIG. 4C).
- the direction in which the monomers are continuous can be changed from the arrow c3 to the arrow c4 (see FIG.
- the monomer constituting the liquid crystalline polymer of the present invention is required to have an asymmetric molecular structure.
- these monomers have a molecular structure that is line-symmetric with respect to the dotted line in the figure. Therefore, it is necessary to use a monomer having a substituent as shown in FIGS. 4E and 4F (R, R 1 and R 2 in FIGS. 4E and 4F are substituents).
- a monomer having a structure as shown in FIG. 4G is not a kink structure. This is because, as shown in FIG. 4 (h), the direction in which the monomers are continuous remains unchanged in the direction of the arrow c5.
- aromatic dicarboxylic acid examples include 2,6-naphthalenedicarboxylic acid, diphenyl ether-3,3′-dicarboxylic acid, diphenoxyethane-3,3′-dicarboxylic acid, and diphenoxyethane-3,3′-dicarboxylic acid.
- aromatic dicarboxylic acids such as diphenylethane-3,3′-dicarboxylic acid and naphthalene-2,6-dicarboxylic acid; halogen substituted products of the above aromatic dicarboxylic acids such as chloroisofudaric acid and bromoisophthalic acid; methyl isophthalic acid
- alkyl-substituted products of the above aromatic dicarboxylic acids such as dimethylisophthalic acid and ethylisophthalic acid
- alkoxy-substituted products of the above aromatic dicarboxylic acids such as methoxyisofudaric acid and ethoxyisofudaric acid.
- the alicyclic dicarboxylic acid only needs to have an asymmetric molecular structure.
- the asymmetric molecular structure has the same meaning as described above.
- the monomer having an asymmetric molecular structure preferably contains a certain amount of a monomer having a kink structure.
- the kink structure refers to a monomer that changes the molecular chain direction (direction in which the monomers are linked) in the liquid crystalline polymer.
- the kink structure is also synonymous with that described above.
- the case where the alicyclic group is a cyclohexane ring will be briefly described.
- a polymer is formed by bonding with another polymer at a portion where there are two carboxyl groups as in the case of an aromatic dicarboxylic acid.
- a monomer having a structure in which the positional relationship between two carboxyl groups is as shown in FIG. 5A has a kink structure. This is because, as shown in FIG. 5 (b), the monomer can change the direction in which the monomers are linked from the arrow d1 to the arrow d2.
- the arrow d1 and the arrow d2 seem to be in the same direction, but the direction in which the monomers are connected is translated by ⁇ d as shown in FIG. 5 (c). As described above, such a change in direction due to parallel movement is also included in the above-mentioned “change in molecular chain direction (direction in which monomers are linked) in the liquid crystalline polymer”. On the other hand, the monomer having a structure as shown in FIG. 5 (d) does not have a kink structure. This is because, as shown in FIG. 5 (e), the direction in which the monomers continue remains unchanged in the direction of the arrow d3.
- alicyclic dicarboxylic acid examples include alicyclic dicarboxylic acids such as cis-1,4-cyclohexanedicarboxylic acid and 1,3-cyclohexanedicarboxylic acid; and trans-1,4- (1-methyl) cyclohexanedicarboxylic acid.
- alicyclic dicarboxylic acids such as cis-1,4-cyclohexanedicarboxylic acid and 1,3-cyclohexanedicarboxylic acid
- trans-1,4- (1-methyl) cyclohexanedicarboxylic acid examples include alkyl, alkoxy and halogen-substituted products of the above alicyclic dicarboxylic acids such as acid and cis-1,4- (1-chloro) cyclohexanedicarboxylic acid.
- Aromatic diol, alicyclic diol, aliphatic diol and derivatives thereof having an asymmetric molecular structure will be described in the order of aromatic diol, alicyclic diol, and aliphatic diol.
- the aromatic diol may be any one having an asymmetric molecular structure.
- the asymmetric molecular structure has the same meaning as described above.
- the kink structure is synonymous with what was demonstrated above, and can be especially considered similarly to aromatic dicarboxylic acid.
- aromatic diols include resorcin, 2,6-naphthalenediol, 3,3′-dihydroxydiphenyl, 3,3′-dihydroxydiphenyl ether, 1,4-, 1,5-, or 2,6-naphthalene.
- Aromatic diols such as diol, 2,2-bis (4-hydroxyphenyl) propane, 2,2-bis (4-hydroxyphenyl) methane; and chlorohydroquinone, methylhydroquinone, butylhydroquinone, phenylhydroquinone, methoxyhydroquinone, phenoxy
- alkyl, alkoxy or halogen substituted products of the above aromatic diols such as hydroquinone, 4-chlororesorcin, 4-methylresorcin and the like.
- the alicyclic diol may have an asymmetric molecular structure.
- the asymmetric molecular structure has the same meaning as described above.
- a liquid crystalline polymer produced by using a certain amount of a kink structure monomer is preferable.
- a polymer is formed by bonding with another polymer at a portion where two hydroxyl groups are present, and alicyclic diols also have a kink structure.
- a kink structure is synonymous with what was demonstrated above, and can be especially considered similarly to alicyclic dicarboxylic acid.
- alicyclic diol examples include cis-1,4-cyclohexanediol, trans-1,4-cyclohexanedimethanol, cis-1,4-cyclohexanedimethanol, trans-1,3-cyclohexanediol, cis- And alicyclic diols such as 1,2-cyclohexanediol and trans-1,3-cyclohexanedimethanol; and alkyl, alkoxy or halogen substituted products of the above alicyclic diols.
- the aliphatic diol is not particularly limited as long as it has an asymmetric molecular structure.
- the asymmetric molecular structure has the same meaning as described above.
- a liquid crystalline polymer produced by using a certain amount of a kink structure monomer is preferable.
- the kink structure has the same meaning as described above, but an aliphatic diol having a kink structure will be briefly described below.
- An aliphatic diol having a kink structure will be briefly described by taking dipropanol as an example.
- a polymer is formed by combining with another polymer at a portion having two hydroxyl groups.
- a monomer having a structure in which the positional relationship between two hydroxyl groups is as shown in FIG. 6A has a kink structure. This is because, as shown in FIG. 6B, the monomer can change the direction in which the monomers are continuous from the arrow e1 to the arrow e2.
- the monomer as shown in FIG. 6C does not have a kink structure, as shown in FIG. 6D, the direction in which the monomers are connected remains unchanged in the direction of the arrow e3.
- aliphatic diol examples include linear or branched aliphatic diols such as 1,2-propanediol, 1,3-butanediol, and neopentyl glycol.
- Aromatic hydroxycarboxylic acid having an asymmetric molecular structure and derivatives thereof are the same as those described in (1), and thus description thereof is omitted.
- the aromatic hydroxyamine may be any one having an asymmetric molecular structure.
- the asymmetric molecular structure has the same meaning as described above.
- An aromatic hydroxyamine having a kink structure can also be used as an asymmetric monomer for forming the liquid crystalline polymer of the present invention.
- the kink structure is synonymous with that described above.
- aromatic hydroxylamine a hydroxyl group and a part of the amine are bonded to other monomers to form a polymer, and therefore the positional relationship between the hydroxyl group and the amine is important in considering the kink structure.
- the kink structure of the aromatic hydroxyamine can be considered in the same manner as the aromatic hydroxycarboxylic acid.
- the aromatic diamine may have any asymmetric molecular structure.
- the asymmetric molecular structure is the same as described above.
- An aromatic diamine having a kink structure can also be used as an asymmetric monomer that forms the liquid crystalline polymer of the present invention.
- the kink structure is synonymous with that described above.
- a certain part of two amines is combined with another monomer to form a polymer, so that a certain part of two amines is important in considering a kink structure.
- the kink structure of the aromatic diamine can be considered in the same manner as the aromatic dicarboxylic acid.
- aromatic hydroxyamine and aromatic diamine examples include 4-aminophenol, 4-acetamidophenol, N-methyl-1,4-phenylenediamine, 3-aminophenol, 3-methyl-4-aminophenol, 2 -Chloro-4-aminophenol, 4-amino-1-naphthol, 4-amino-4'-hydroxydiphenyl, 4-amino-4'-hydroxydiphenyl ether, 4-amino-4'-hydroxydiphenylmethane, 4-amino- Examples include 4′-hydroxydiphenyl sulfide, 2,5-diaminotoluene and the like. Examples of ester derivatives and / or amide derivatives of these aromatic hydroxyamines and aromatic diamines include derivatives such as acetyl and propionyl.
- Aromatic dicarboxylic acid, alicyclic dicarboxylic acid and derivatives thereof having an asymmetric molecular structure are the same as those described in (2-B) above, and thus description thereof is omitted.
- Aromatic hydroxycarboxylic acid having an asymmetric molecular structure and derivatives thereof are the same as those described in (1) above, and thus description thereof is omitted.
- Aromatic hydroxyamines, aromatic diamines and derivatives thereof having an asymmetric molecular structure are the same as those described in (3-B) above, and will not be described.
- Aromatic dicarboxylic acids, alicyclic dicarboxylic acids and derivatives thereof having an asymmetric molecular structure are the same as those described in (2-B) above, and thus description thereof is omitted.
- Aromatic diols, alicyclic diols, aliphatic diols and derivatives thereof having an asymmetric molecular structure are the same as those described in (2-C) above, and thus description thereof is omitted.
- a molecular weight modifier may be used in combination with the above-described constituent components (monomer) as necessary.
- Preferred examples of the specific compound constituting the liquid crystalline polymer of the present invention include 4-hydroxybenzoic acid (4-HBA), 6-hydroxy-2-naphthoic acid (HNA), N-acetyl-aminobenzoic acid ( ABA), and 4-hydroxy-4′-biphenylcarboxylic acid (HBCA).
- Specific examples of the kink structure compound suitable for the present invention include 3-hydroxybenzoic acid (3-HBA) and 6-hydroxy-2-naphthoic acid (HNA).
- the liquid crystalline polymer of the present invention has a melting enthalpy ⁇ H of 2.0 J / g or more and 10 J / g or less.
- the melting enthalpy ⁇ H is adjusted by changing the monomer component of the liquid crystalline polymer and adjusting the molecular weight of the liquid crystalline polymer.
- the value measured by the differential scanning calorimetry (DSC) is adopted as the value of the melting endotherm ⁇ H.
- melting endotherm ⁇ H is 2.0 J / g or more, it is preferable because the proportion of the highly ordered structure (crystal structure) in the polymer solid is high, and if it is 10 J / g or less, it is melted as an injection molding material. This is preferable because the solidification process can be easily controlled.
- a more preferable range of melting enthalpy ⁇ H is 4.0 J / g or more and 8.0 J / g or less.
- a particularly preferred monomer for adjusting the melting enthalpy ⁇ H to the above range is preferably a monomer having a plurality of aromatic rings, in which the plurality of aromatic rings are rotatably coupled, and a particularly preferred monomer is, for example, 4-hydroxy-4 '-Biphenylcarboxylic acid (HBCA).
- HBCA 4-hydroxy-4 '-Biphenylcarboxylic acid
- the liquid crystalline polymer of the present invention is obtained by polymerizing a monomer having an asymmetric molecular structure.
- the monomer having an asymmetric molecular structure as a raw material has a monomer having a kink structure in an amount of 0.1 mol% or more and 9.0 mol%. The following are preferably included. If the amount of the monomer having a kink structure is 0.1 mol% or more in the total amount of the monomer, it is preferable because a polymer having a melting point capable of injection molding can be obtained, and the amount of the monomer having a kink structure is preferably 9.
- ⁇ H is high, which is preferable because a desired thermal diffusivity can be obtained.
- the monomer having a kink structure include the above-mentioned monomers, and the use of 6-hydroxy-2-naphthoic acid (HNA) is particularly preferable.
- the liquid crystalline polymer of the present invention has an intrinsic viscosity (IV) of 5 dL / g or more and 7 dL / g or less.
- IV intrinsic viscosity
- a value measured at 25 ° C. in orthochlorophenol is adopted. If the intrinsic viscosity is in the above range, a liquid crystalline polymer can be produced by melt polymerization.
- a more preferable range of the intrinsic viscosity is 5.5 dL / g or more and 6.5 dL / g or less.
- Intrinsic viscosity is related to the molecular weight and the type of monomer used. In particular, increasing the polymerization time tends to increase the intrinsic viscosity, and shortening the polymerization time tends to decrease the intrinsic viscosity. In this way, the intrinsic viscosity can be adjusted.
- the present invention is characterized by adjusting the intrinsic viscosity and melting enthalpy to specific ranges, but these physical properties are particularly related to the molecular weight and the type of monomer used.
- 4-hydroxybenzoic acid (4-HBA) 6-hydroxy-2-naphthoic acid (HNA), 4-hydroxy-4'-biphenylcarboxylic acid (HBCA) is used as a monomer, specific viscosity and melting endotherm are specified. This is preferable because it is easy to adjust the range.
- the method for producing the liquid crystalline polymer of the present invention is not particularly limited, and a conventionally known polymerization method can be used. Whatever polymerization method is used, a molded article having high thermal conductivity and sufficient mechanical strength can be obtained.
- Conventionally known polymerization methods include a melt polymerization method, a solid phase polymerization method, a solution polymerization method, an interfacial polymerization method, a suspension polymerization method and the like.
- the melt polymerization method is generally preferred from the viewpoint of process simplicity and production cost. Since the intrinsic viscosity of the liquid crystalline polymer of the present invention is in the above range, it can be preferably produced by melt polymerization.
- One of the features of the present invention is that it can be produced by a melt polymerization method.
- the molded article of the present invention is formed by molding a liquid crystalline resin composition containing the liquid crystalline polymer of the present invention.
- the liquid crystalline polymer of the present invention is obtained by polymerizing a monomer having an asymmetric molecular structure, and the melting enthalpy ⁇ H measured by DSC is adjusted to a range of 2.0 J / g or more and 10 J / g or less, Intrinsic viscosity (IV) is adjusted in the range of 5 dL / g or more and 7 dL / g or less.
- IV Intrinsic viscosity
- the molded article of the present invention has high thermal conductivity and sufficient mechanical strength.
- the liquid crystalline polymer of this invention contained in material is easy to manufacture, the molded object of this invention also becomes easy to manufacture.
- the molded body of the present invention has sufficient mechanical strength.
- Sufficient mechanical strength means that the fiber strength measured by the method as described in an Example is 50 Mpa or more, for example.
- the liquid crystalline resin composition used as the raw material of the molded body is not particularly limited as long as it contains the liquid crystalline polymer of the present invention.
- Conventionally known additives such as other resins, antioxidants and pigments may be added to the liquid crystalline resin composition as long as the object of the present invention is not impaired.
- a preferable component contained in addition to the liquid crystalline polymer of the present invention is a filler having a thermal conductivity of 2 W / m ⁇ K or more and 100 W / m ⁇ K or less. If the thermal conductivity is 2 or more, it is preferable because the thermal conductivity of the molded product can be further increased, and if the thermal conductivity is 100 or less, there is little risk of decomposing the polymer in blending with the polyester resin (this).
- the filler having a thermal conductivity of 2 to 100 examples include talc, titanium oxide, graphite, and boron nitride.
- the content of the filler is preferably 10 parts by mass or more and 500 parts by mass or less with respect to 100 parts by mass of the liquid crystalline polymer.
- the method for producing the molded product of the present invention is not particularly limited, and it can be produced by selecting a preferable one from conventionally known production methods depending on the type and shape of the molded product.
- liquid crystalline polymer used in Examples and Comparative Examples was produced by the following method.
- Example 1 A polymerization vessel equipped with a stirrer, a reflux column, a monomer inlet, a nitrogen inlet, and a pressure reduction / outflow line was charged with the following raw material monomers, a metal catalyst, and an acylating agent, and nitrogen substitution was started.
- 4-HBA 4-hydroxybenzoic acid
- II 6-Hydroxy-2-naphthoic acid 20.3 g (5 mol%)
- HNA 4-dihydroxybiphenyl-4-carboxylic acid 101.5 g (22 mol%)
- HBCA Potassium acetate catalyst 22.5mg
- the temperature of the reaction system was raised to 140 ° C. and reacted at 140 ° C. for 1 hour. Thereafter, the temperature is further raised to 320 ° C. over 5 hours, and then the pressure is reduced to 10 Torr (ie, 1330 Pa) over 20 minutes, and melt polymerization is performed while distilling off acetic acid, excess acetic anhydride, and other low-boiling components. went.
- 10 Torr ie, 1330 Pa
- melt polymerization is performed while distilling off acetic acid, excess acetic anhydride, and other low-boiling components. went.
- the stirring torque reached a value of about 1.5 kgf ⁇ cm
- nitrogen was introduced to change from a reduced pressure state to a normal pressure through a normal pressure, and the polymer was discharged in a strand form from the lower part of the polymerization vessel. The strand was cut into pellets.
- Example 2 Comparative Examples 1 to 5> A polymer was obtained in the same manner as in Example 1 except that the types and amounts charged of the raw material monomers were as shown in Tables 1 and 2 and the final polymerization temperature was Tm + 20 to 40 ° C. of the obtained polymer. These results are shown in Tables 1 and 2. Abbreviations of raw material monomers used are as follows. (IV) Isophthalic acid (TA) (V) 4,4′-dihydroxybiphenyl (BP)
- Example 3 after the raw materials were charged, the temperature of the reaction system was raised to 140 ° C. and reacted at 140 ° C. for 1 hour. Thereafter, the temperature is further increased to 380 ° C. over 5 hours, and then the pressure is reduced to 10 Torr (ie, 1330 Pa) over 20 minutes, and melt polymerization is performed while distilling acetic acid, excess acetic anhydride, and other low boiling points. went. After the stirring torque reached a value of about 1.5 kgf ⁇ cm, nitrogen was introduced to change from a reduced pressure state to a normal pressure through a normal pressure, and the polymer was discharged in a strand form from the lower part of the polymerization vessel. The strand was cut into pellets.
- 10 Torr ie, 1330 Pa
- Comparative Example 6 is the same as in Examples 3 and 4 until melt polymerization. After melt polymerization, after the stirring torque reaches a value of about 0.15 kgf ⁇ cm, nitrogen is introduced and the pressure is increased from the reduced pressure to normal pressure. Under pressure, the polymer was discharged in a strand form from the bottom of the polymerization vessel. The strand was cut into pellets.
- Comparative Example 7 is the same as in Examples 3 and 4 until melt polymerization. After melt polymerization, after the stirring torque reached a value of about 2.5 kgf ⁇ cm, nitrogen was introduced and the pressure was increased from the reduced pressure to normal pressure. Although it was in a pressure state, it was difficult to discharge, so the polymerization vessel was disassembled and the polymer was collected.
- Example 5 after the raw materials were charged, the temperature of the reaction system was raised to 140 ° C. and reacted at 140 ° C. for 1 hour. Thereafter, the temperature is further increased to 340 ° C. for Example 5 and to 330 ° C. for Example 6 over 3.5 hours, and then reduced to 10 Torr (that is, 1330 Pa) over 20 minutes. Melt polymerization was performed while distilling off acetic acid and other low-boiling components. After the stirring torque reached a value of about 1.5 kgf ⁇ cm, nitrogen was introduced to change from a reduced pressure state to a normal pressure through a normal pressure, and the polymer was discharged in a strand form from the lower part of the polymerization vessel. The strand was cut into pellets.
- X-ray diffraction measurement Measurement was performed using a RINT manufactured by Rigaku Corporation using a sample obtained by annealing a disk-shaped molded body having a diameter of 20 mm and a thickness of 2 mm at a temperature of melting point + 20 ° C. for 10 minutes.
- the disk-shaped molded body is obtained by heating the obtained pellet-shaped polymer to a temperature 20 ° C. higher than the melting point, hot pressing it at a pressure of 10 MPa, and processing it to a predetermined size.
- Ubbelohde capillary viscometer
- Thermal diffusivity Using a disk-shaped molded body having a diameter of 20 mm and a thickness of 100 ⁇ m, the thermal conductivity was measured with an eye phase mobile 1u manufactured by Eye Phase Co., Ltd. by temperature wave thermal analysis.
- the disk-shaped molded body is obtained by heating the obtained pellet-shaped polymer to a temperature 20 ° C. higher than the melting point, hot pressing it at a pressure of 10 MPa, and processing it to a predetermined size.
- the present invention uses an asymmetric monomer, and adjusts the melting enthalpy ⁇ H of the liquid crystalline polymer to 2.0 J / g or more and 10 J / g or less, and the intrinsic viscosity (IV) to 5 dL / g or more and 7 dL / g or less.
- the molecular weight and structure of the liquid crystalline polymer are preferably adjusted, the liquid crystalline polymer becomes dense in the molded body, the thermal conductivity of the molded body is increased, the mechanical strength is increased, and the production is facilitated.
- the liquid crystalline polymer containing a certain amount of a kink-structured monomer has high mechanical strength (fiber strength). There is a tendency. In particular, when HNA is used as a monomer having a kink structure, the mechanical strength is increased.
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Abstract
Description
本発明の液晶性高分子は、非対称な分子構造を有するモノマーを重合してなり、DSCにより測定した融解エンタルピーΔHが、2.0J/g以上10J/g以下であり、固有粘度(I.V.)が、5dL/g以上7dL/g以下であることを特徴とする。
また、図2(c)に示すような構造のモノマーもキンク構造のモノマーである。図2(d)に示すように、モノマーが連なる方向を矢印a3から矢印a4に変化させることができるモノマーだからである。
一方、図2(e)に示すような構造のモノマーはキンク構造のモノマーではない。図2(f)に示すように、モノマーが連なる方向が矢印a5の方向のまま変化が無いからである。
ヒドロキシ基とカルボキシル基の位置関係が図3(a)に示すような構造のモノマーはキンク構造のモノマーである。図3(b)に示すように、モノマーが連なる方向を矢印b1から矢印b2に変化させることができるモノマーだからである。矢印b1と矢印b2は、同じ方向であると考えることもできるが、図3(c)に示すようにモノマーが連なる方向がΔbだけ平行移動している。このような平行移動による方向の変化も上記「液晶性高分子における分子鎖方向(モノマーが連なる方向)を変化」に含む。
また、図3(d)に示すような構造のモノマーもキンク構造のモノマーである。図3(e)に示すように、モノマーが連なる方向を矢印b3から矢印b4に変化させることができるモノマーだからである。
また、図3(f)に示すような構造のモノマーもキンク構造のモノマーである。図3(g)に示すように、モノマーが連なる方向を矢印b5から矢印b6に変化させることができるモノマーだからである。
一方、図3(h)に示すような構造のモノマーはキンク構造のモノマーではない。図3(i)に示すように、モノマーが連なる方向が矢印b7の方向のまま変化が無いからである。
より具体的には以下の化合物を挙げることができる。
4-ヒドロキシ安息香酸、3-ヒドロキシ安息香酸等のヒドロキシ安息香酸;
3-メチル-4-ヒドロキシ安息香酸、3,5-ジメチル-4-ヒドロキシ安息香酸、2,6-ジメチル-4-ヒドロキシ安息香酸等のヒドロキシ安息香酸のアルキル置換体;
3-メトキシ-4-ヒドロキシ安息香酸、3,5-ジメトキシ-4-ヒドロキシ安息香酸等のヒドロキシ安息香酸のアルコキシ置換体;
3-クロロ-4-ヒドロキシ安息香酸、2-クロロ-4-ヒドロキシ安息香酸、2,3-ジクロロ-4-ヒドロキシ安息香酸、3,5-ジクロロ-4-ヒドロキシ安息香酸、2,5-ジクロロ-4-ヒドロキシ安息香酸、3-ブロモ-4-ヒドロキシ安息香酸等のヒドロキシ安息香酸のハロゲン置換体等;
6-ヒドロキシ-2-ナフトエ酸、7-ヒドロキシ-2-ナフトエ酸、6-ヒドロキシ-1-ナフトエ酸等のヒドロキシナフトエ酸;
6-ヒドロキシ-5-メチル-2-ナフトエ酸等のヒドロキシナフトエ酸のアルキル置換体;
6-ヒドロキシ-5-メトキシ-2-ナフトエ酸等のヒドロキシナフトエ酸のアルコキシ置換体;
6-ヒドロキシ-5-クロロ-2-ナフトエ酸、6-ヒドロキシ-7-クロロ-2-ナフトエ酸、6-ヒドロキシ-5,7-ジクロロ-2-ナフトエ酸等のヒドロキシナフトエ酸のハロゲン置換体等が挙げられる。
以上の化合物の中でキンク構造を有する化合物は、3-ヒドロキシ安息香酸、6-ヒドロキシ-2-ナフトエ酸、7-ヒドロキシ-2-ナフトエ酸、6-ヒドロキシ-1-ナフトエ酸、6-ヒドロキシ-5-メチル-2-ナフトエ酸、6-ヒドロキシ-5-メトキシ-2-ナフトエ酸、6-ヒドロキシ-5-クロロ-2-ナフトエ酸、6-ヒドロキシ-7-クロロ-2-ナフトエ酸、6-ヒドロキシ-5,7-ジクロロ-2-ナフトエ酸である。
一方、図4(g)に示すような構造のモノマーはキンク構造ではない。図4(h)に示すように、モノマーが連なる方向が矢印c5の方向のまま変化が無いからである。
一方、図5(d)に示すような構造のモノマーはキンク構造ではない。図5(e)に示すように、モノマーが連なる方向が矢印d3の方向のまま変化しないからである。
一方、図6(c)に示すようなモノマーはキンク構造ではない、図6(d)に示すように、モノマーが連なる方向が矢印e3の方向のまま変化しないからである。
本発明の液晶性高分子は、融解エンタルピーΔHが2.0J/g以上10J/g以下である。融解エンタルピーΔHの調整は、液晶性高分子のモノマー成分を変化させること、液晶性高分子の分子量を調整することで行う。なお、融解吸熱量ΔHの値は示差走査熱量測定(DSC)により測定した値を採用する。融解吸熱量ΔHが2.0J/g以上であれば秩序性の高い構造(結晶構造)がポリマー固体中に占める割合が高いという理由で好ましく、10J/g以下であれば射出成形材料として溶融・固化過程を制御しやすいという理由で好ましい。より好ましい融解エンタルピーΔHの範囲は、4.0J/g以上8.0J/g以下である。
本発明の液晶性高分子は、非対称な分子構造を有するモノマーを重合してなるが、原料となる非対称な分子構造を有するモノマー中にキンク構造を有するモノマーが0.1mol%以上9.0mol%以下含まれていることが好ましい。キンク構造を有するモノマーの使用量がモノマー全量中0.1mol%以上であれば、射出成形可能な融点のポリマーが得られるという理由で好ましく、キンク構造を有するモノマーの使用量がモノマー全量中9.0mol%以下であればΔHが高く、所望の熱拡散率が得られるという理由で好ましい。キンク構造を有するモノマーとしては上記のモノマーが挙げられるが、6-ヒドロキシ-2-ナフトエ酸(HNA)の使用が特に好ましい。
本発明の液晶性高分子は、固有粘度(I.V.)が5dL/g以上7dL/g以下である。固有粘度はオルソクロルフェノール中25℃で測定した値を採用する。固有粘度が上記の範囲にあれば、溶融重合により液晶性高分子を製造することが可能になる。より好ましい固有粘度の範囲は5.5dL/g以上6.5dL/g以下である。固有粘度は分子量、使用するモノマーの種類と関係している。特に重合時間を長くすることで固有粘度は高まり、重合時間を短くすることで固有粘度は低下する傾向にある。このようにして、固有粘度を調整することができる。
本発明の液晶性高分子の製造方法は、特に限定されず従来公知の重合法を用いることができる。どのような重合方法を用いても熱伝導性が高く充分な機械的強度を備える成形体を得ることができる。従来公知の重合法としては、溶融重合法、固相重合法、溶液重合法、界面重合法、懸濁重合法等が挙げられる。これらの重合法の中では、プロセスの簡便さ、製造コストから一般に溶融重合法が好ましい。本発明の液晶性高分子の固有粘度は、上記範囲であるため溶融重合で好ましく製造することができる。溶融重合法で製造できる点が、本発明の特徴の一つである。
本発明の成形体は、本発明の液晶性高分子を含む液晶性樹脂組成物を成形してなる。本発明の液晶性高分子は、上記の通り、非対称な分子構造を有するモノマーを重合してなり、DSCにより測定した融解エンタルピーΔHが2.0J/g以上10J/g以下の範囲に調整され、固有粘度(I.V.)が5dL/g以上7dL/g以下の範囲に調整されている。その結果、本発明の成形体は、高い熱伝導性を有し、充分な機械的強度を備える。そして、材料に含まれる本発明の液晶性高分子が製造容易であるため、本発明の成形体も製造が容易になる。
撹拌機、還流カラム、モノマー投入口、窒素導入口、減圧/流出ラインを備えた重合容器に、以下の原料モノマー、金属触媒、アシル化剤を仕込み、窒素置換を開始した。
(I)4-ヒドロキシ安息香酸217.1g(73モル%)(4-HBA)
(II)6-ヒドロキシ-2-ナフトエ酸20.3g(5モル%)(HNA)
(III)4-ジヒドロキシビフェニル-4-カルボン酸101.5g(22モル%)(HBCA)
酢酸カリウム触媒22.5mg
無水酢酸224.2g
原料モノマーの種類、仕込み量を表1、2に示す通りとし、最終重合温度を得られたポリマーのTm+20~40℃とした以外は、実施例1と同様にしてポリマーを得た。これら結果を表1、2に示す。使用した原料モノマーの略称は以下のものを示す。
(IV)イソフタル酸(TA)
(V)4,4’-ジヒドロキシビフェニル(BP)
撹拌機、還流カラム、モノマー投入口、窒素導入口、減圧/流出ラインを備えた重合容器に、以下の原料モノマー、金属触媒、アシル化剤を仕込み、窒素置換を開始した。
(I)4-ヒドロキシ安息香酸215.1g(73モル%)(4-HBA)
(II)4-ジヒドロキシビフェニル-4-カルボン酸123.4g(27モル%)(HBCA)
酢酸カリウム触媒22.5mg
無水酢酸222.1g
撹拌機、還流カラム、モノマー投入口、窒素導入口、減圧/流出ラインを備えた重合容器に、以下の原料モノマーを表1に示す割合で、金属触媒、アシル化剤を仕込み、窒素置換を開始した。
(I)4-ヒドロキシ安息香酸(4-HBA)
(II)4-ジヒドロキシビフェニル-4-カルボン酸(HBCA)
(VI)3-ヒドロキシ安息香酸(3-HBA)
酢酸カリウム触媒22.5mg
無水酢酸222.1g
実施例及び比較例の液晶性高分子を用いて、下記評価に必要な成形体を作製し、液晶性高分子、成形体の物性を評価した。評価結果を表1、2に示した。
TAインスツルメント社製DSC Q-1000にて下記条件で測定し、2回目の測定における値を融点/Tm、融解エンタルピー/ΔHとした。
(条件)
50℃⇒(20℃/min.-1)⇒Tm+40℃x3min.hold⇒(20℃/min.-1)⇒50℃x3min.hold⇒(20℃/min.-1)⇒Tm+40℃x3min.hold
直径20mm、厚さ2mmの円板状成形体を融点+20℃の温度にて、10分間アニーリング処理した試料を用い、株式会社リガク製 RINTを使用して測定した。尚、円板状成形体は、得られたペレット状のポリマーを融点より20℃高い温度に加熱し、10MPaの圧力でホットプレスし、所定の大きさに加工したものである。
得られたX線回折パターンから、(110)面に帰属される回折角2θ=19°付近の強い散乱ピークのピークトップから下記式Braggの条件に従い、平均面間隔(d-spacing)を算出した。
2d・sinθ=n・λ
n:反射次数(n=1)
λ:X線波長(1.5418Å)
[固有粘度/I.V.]
得られたポリマーを20mg採取し、10ccのペンタフルオロフェノールにて60℃の温度下で溶解した。その後、10ccのクロロホルムを加え、30℃の温度下にて毛細管粘度計 (ウベローデ)を使用して測定した。
直径20mm、厚さ100μmの円板状成形体を用い、温度波熱分析法による株式会社アイフェイズ製 アイフェイズ・モバイル1uにて熱伝導率を測定した。尚、円板状成形体は、得られたペレット状のポリマーを融点より20℃高い温度に加熱し、10MPaの圧力でホットプレスし、所定の大きさに加工したものである。
得られたポリマーを株式会社東洋精機製 キャピログラフ1Bを用いて、各ポリマーのTm+20℃の温度において、Φ0.5mmx20mmのキャピラリーを通すことによって繊維を作製した。得られた繊維を株式会社東洋精機製 テンシロンにて100mm/min.-1の速度にて引っ張り試験を行い、繊維強度を測定した。
後述する製造方法によってポリマーを作製する際に、重合容器の下部からポリマーを排出する様子を目視にて観察し、下記基準により評価した。
製造性 ○:重合容器の下部からストランド上に排出され、ストランドカッターによりカッティング可能
製造性 ×:重合容器の下部から排出不可能
Claims (5)
- 非対称な分子構造を有するモノマーを重合してなり、
DSCにより測定した融解エンタルピーΔHが、2.0J/g以上10J/g以下であり、
固有粘度(I.V.)が、5dL/g以上7dL/g以下である液晶性高分子。 - 前記非対称な分子構造を有するモノマーは、4-ヒドロキシ安息香酸、6-ヒドロキシ-2-ナフトエ酸、N-アセチル-アミノ安息香酸及び4-ヒドロキシ-4’-ビフェニルカルボン酸なる群より選択される少なくとも一種である請求項1に記載の液晶性高分子。
- 前記非対称な分子構造を有するモノマーは、キンク構造を有するモノマーを0.1mol%以上9.0mol%以下含む請求項1又は2に記載の液晶性高分子。
- 前記キンク構造を有するモノマーは、3-ヒドロキシ安息香酸又は6-ヒドロキシ-2-ナフトエ酸である請求項3に記載の液晶性高分子。
- 請求項1から4のいずれかに記載の液晶性高分子を成形してなる成形体を融点(Tm)+20℃の条件で10分間アニーリング処理した試料を用いて、広角X線回析測定法により測定した2θ=19°付近に観測される(110)面に由来する回析ピークからBragg式を用いて算出される平均面間隔が4.0Å以上4.5Å以下である液晶性高分子。
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US (1) | US20120190813A1 (ja) |
EP (1) | EP2471835A4 (ja) |
JP (1) | JP5543479B2 (ja) |
KR (1) | KR101590594B1 (ja) |
CN (1) | CN102574992B (ja) |
MY (1) | MY156834A (ja) |
SG (1) | SG179099A1 (ja) |
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Cited By (5)
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CN103502358A (zh) * | 2011-05-06 | 2014-01-08 | 三星精密化学株式会社 | 反射体和包括该反射体的发光装置 |
JP2020041006A (ja) * | 2018-09-06 | 2020-03-19 | ポリプラスチックス株式会社 | 全芳香族ポリエステル |
US10913879B2 (en) | 2014-02-24 | 2021-02-09 | Henkel IP & Holding GmbH | Thermally conductive pre-applied underfill formulations and uses thereof |
JP2021066776A (ja) * | 2019-10-21 | 2021-04-30 | 上野製薬株式会社 | 液晶ポリエステル樹脂 |
CN113527647A (zh) * | 2021-08-04 | 2021-10-22 | 中国科学院长春应用化学研究所 | 一种液晶聚合物及其制备方法,以及液晶聚合物薄膜 |
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KR101996106B1 (ko) | 2011-11-15 | 2019-07-03 | 티코나 엘엘씨 | 치수 공차가 작은 성형 부품에 사용하기 위한 저-나프텐 액정 중합체 조성물 |
WO2013074470A2 (en) | 2011-11-15 | 2013-05-23 | Ticona Llc | Fine pitch electrical connector and a thermoplastic composition for use therein |
KR102098411B1 (ko) | 2011-11-15 | 2020-04-07 | 티코나 엘엘씨 | 콤팩트 카메라 모듈 |
TWI534253B (zh) | 2011-11-15 | 2016-05-21 | 堤康那責任有限公司 | 具有改良可燃性效能之富含環烷之液晶聚合物組合物 |
JP2014533325A (ja) | 2011-11-15 | 2014-12-11 | ティコナ・エルエルシー | 低ナフテン系液晶ポリマー組成物 |
EP2886656A1 (en) | 2013-12-18 | 2015-06-24 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | New enzyme and method for preparing 4-hydroxyl benzyl alcohol and derivatives thereof |
CN103881377B (zh) * | 2014-04-14 | 2016-04-20 | 云南银峰新材料有限公司 | 一种lcp衍生物/软磁性铁氧体复合材料及其制备方法 |
US20220380674A1 (en) * | 2021-05-18 | 2022-12-01 | Ticona Llc | Photoplethysmographic Sensor Containing A Polymer Composition |
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- 2010-09-03 CN CN201080043352.5A patent/CN102574992B/zh active Active
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- 2010-09-03 WO PCT/JP2010/065149 patent/WO2011040184A1/ja active Application Filing
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103502358A (zh) * | 2011-05-06 | 2014-01-08 | 三星精密化学株式会社 | 反射体和包括该反射体的发光装置 |
US10913879B2 (en) | 2014-02-24 | 2021-02-09 | Henkel IP & Holding GmbH | Thermally conductive pre-applied underfill formulations and uses thereof |
JP2020041006A (ja) * | 2018-09-06 | 2020-03-19 | ポリプラスチックス株式会社 | 全芳香族ポリエステル |
JP7136636B2 (ja) | 2018-09-06 | 2022-09-13 | ポリプラスチックス株式会社 | 全芳香族ポリエステル |
JP2021066776A (ja) * | 2019-10-21 | 2021-04-30 | 上野製薬株式会社 | 液晶ポリエステル樹脂 |
JP7339843B2 (ja) | 2019-10-21 | 2023-09-06 | 上野製薬株式会社 | 液晶ポリエステル樹脂 |
CN113527647A (zh) * | 2021-08-04 | 2021-10-22 | 中国科学院长春应用化学研究所 | 一种液晶聚合物及其制备方法,以及液晶聚合物薄膜 |
Also Published As
Publication number | Publication date |
---|---|
KR101590594B1 (ko) | 2016-02-01 |
EP2471835A1 (en) | 2012-07-04 |
MY156834A (en) | 2016-03-31 |
JPWO2011040184A1 (ja) | 2013-02-28 |
TW201120088A (en) | 2011-06-16 |
KR20120088718A (ko) | 2012-08-08 |
CN102574992A (zh) | 2012-07-11 |
JP5543479B2 (ja) | 2014-07-09 |
EP2471835A4 (en) | 2014-07-23 |
SG179099A1 (en) | 2012-04-27 |
TWI496810B (zh) | 2015-08-21 |
CN102574992B (zh) | 2015-03-11 |
US20120190813A1 (en) | 2012-07-26 |
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