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Novel thermotropic liquid crystal polymer and preparation method thereof

A thermotropic liquid crystal and polymer technology, applied in the polymer field, can solve the problems of limitation, poor mechanical properties, difficult processing, etc., and achieve the effect of reducing cost and good fluidity

Active Publication Date: 2019-08-30
珠海派锐尔新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is a new type of polymer material, which generally exhibits liquid crystallinity in the molten state. It has excellent properties such as high strength, high rigidity, high temperature resistance, and electrical insulation. It is used in many fields such as electronics, optical fibers, automobiles, and aerospace. In the field of thermotropic liquid crystal polymer (TLCP), which is one of its main categories, in the early stage of development, because it is a polymer made of pure rigid monomers, its mechanical properties are poor and difficult to process, which limits its development field

Method used

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  • Novel thermotropic liquid crystal polymer and preparation method thereof
  • Novel thermotropic liquid crystal polymer and preparation method thereof
  • Novel thermotropic liquid crystal polymer and preparation method thereof

Examples

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Effect test

Embodiment 1

[0089] S1: Add 301.1g acetic anhydride solution, 202.4g p-hydroxybenzoic acid, 201.97g bisphenol A diether diamine, 91.82 g of bisphenol A diether diacids, 49.01 g of terephthalic acid, and then 0.07 g of N-methylimidazole were added to the stirred mixture. After the inside of the reactor was sufficiently replaced with nitrogen, the temperature of the mixture was raised to 150° C. within 20 minutes under a nitrogen flow, and while maintaining the temperature, the mixture was refluxed for 1 hour. In 2 hours and 20 minutes, the temperature was raised to 315°C, while the distillate of by-product acetic acid and unreacted acetic anhydride was removed, and the time point when the torque was raised was considered as the end of the reaction, and the prepolymer was taken out and cooled to After room temperature, use a universal crusher to crush the prepolymer into powder, and dry the crushed material in vacuum at 130°C for 2 hours to obtain the prepolymer powder;

[0090] S2: Add pre...

Embodiment 2

[0092]S1: Add 272.27g acetic anhydride solution, 202.4g p-hydroxybenzoic acid, 136.67g bisphenol S type diether diamine, 154.99 g of bisphenol S type diether diacid, and then, 0.11 g of N-methylimidazole was added to the stirred mixture. After the inside of the reactor was sufficiently replaced with nitrogen, the temperature of the mixture was raised to 155° C. within 25 minutes under a nitrogen flow, and while maintaining the temperature, the mixture was refluxed for 1.5 hours. In 2 hours and 40 minutes, the temperature was raised to 320 ° C, while removing the distillate of by-product acetic acid and unreacted acetic anhydride, the time point when the torque was raised was considered to be the end of the reaction, and the prepolymer was taken out and cooled to After room temperature, use a universal crusher to crush the prepolymer into powder, and dry the crushed material in vacuum at 130°C for 2 hours to obtain the prepolymer powder;

[0093] S2: Put the prepolymer powder ...

Embodiment 3

[0095] S1: Add 283.59g acetic anhydride solution, 202.4g p-hydroxybenzoic acid, 75.74g bisphenol A type diether diamine, 90.49 g of bisphenol S type diether diacid, and then, 0.07 g of N-methylimidazole was added to the stirred mixture. After the inside of the reactor was sufficiently replaced with nitrogen, the temperature of the mixture was raised to 150° C. within 30 minutes under a nitrogen flow, and while maintaining the temperature, the mixture was refluxed for 1 hour. Raise the temperature to 315°C within 3 hours while removing the distillate of by-product acetic acid and unreacted acetic anhydride. It is considered that the time point when the torque increases is the end of the reaction, and the prepolymer is taken out. After cooling to room temperature , use a universal crusher to crush the prepolymer into powder, and dry the crushed material in vacuum at 130°C for 2 hours to obtain the prepolymer powder;

[0096] S2: Add prepolymer powder into the reaction kettle, a...

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Abstract

The invention discloses a thermotropic liquid crystal polymer. The polymer is characterized by comprising the following components, in percentages by molar: 50-85% of p-hydroxybenzoic acid, 7.5-20% ofaromatic diether diacid, 7.5-20% of aromatic diether diamine, and 0-20% of terephthalic acid, wherein a ratio of a mole number of the aromatic diether diamine to a sum of mole numbers of the aromaticdiether diacid and terephthalic acid is 1.2:1 to 1:1.2. According to the polymer provided by the invention, an aromatic ether-containing functional group is introduced into a traditional thermoplastic aromatic polyester molecular chain, the self-prepared functional aromatic diether diacid is utilized to replace a traditional diacid monomer having a meta-benzene structure, the functional aromaticdiether diamine is utilized to replace a traditional hydroquinone monomer, and the thermotropic liquid crystal polymer with good mechanical properties is prepared; and the application field is broadened while the costs are reduced.

Description

technical field [0001] The invention belongs to the technical field of macromolecules, and in particular relates to a novel thermotropic liquid crystal polymer and a preparation method thereof. Background technique [0002] Liquid crystal polymer (LCP) is an intermediate state polymer between solid crystal and liquid, and its molecular arrangement has a certain order. It is a new type of polymer material, which generally exhibits liquid crystallinity in the molten state. It has excellent properties such as high strength, high rigidity, high temperature resistance, and electrical insulation. It is used in many fields such as electronics, optical fibers, automobiles, and aerospace. In the field of thermotropic liquid crystal polymer (TLCP), which is one of its main categories, in the early stage of development, because it is a polymer made of pure rigid monomers, its mechanical properties are poor and it is difficult to process, which limits its development field. In order to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/685C08G63/60C08G63/672C08G63/80C09K19/38
CPCC08G63/605C08G63/672C08G63/6856C08G63/80C09K19/3809
Inventor 王贤文黄文刚谭麟饶先花龚维胡三友
Owner 珠海派锐尔新材料有限公司
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