Method for improving molecular weight of thermotropic liquid crystal polymer

A technology of liquid crystal polymers and thermotropic liquid crystals, applied in liquid crystal materials, chemical instruments and methods, etc., to achieve the effects of chemical corrosion resistance, high dimensional precision, and low linear expansion coefficient
CN103804667AInactive Publication Date: 2014-05-21NANTONG HAIDI CHEM +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANTONG HAIDI CHEM
Publication Date
2014-05-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for improving the molecular weight of a thermotropic liquid crystal polymer. According to the method, in the process of preparing the thermotropic liquid crystal polymer by using p-hydroxybenzoic acid / p-acetoxybenzoic acid, 6-hydroxy-2-naphthoic acid / 6-acetoxy-2-naphthoic acid, hydroquinone / hydroquinone diacetate and terephthalic acid, the molar ratio of the hydroquinone / hydroquinone diacetate to the terephthalic acid is controlled to be (1.005-1.025): 1. The molecular weight of the polymer product is controlled by controlling the addition amount of certain monomers, so that the polymerization time can be greatly shortened and the production efficiency is improved.
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Description

Technical field:

[0001] The invention relates to a method for increasing the molecular weight of a thermotropic liquid crystal polymer, which belongs to the technical field of organic chemistry. Background technique:

[0002] Thermotropic liquid crystal polymer (TLCP) is a new type of ultra-high performance polymer material developed rapidly in the past ten years. It has high strength, high modulus, high temperature resistance, low moisture absorption, good dielectric properties, and high Flame retardancy, chemical corrosion resistance, microwave transparency, good radiation resistance and vibration absorption; at the same time, it also has excellent fluidity and processing performance, low linear expansion coefficient, high dimensional precision and stable size Good performance and a series of excellent comprehensive properties. It can be used as self-reinforced engineering plastics, high-performance fibers, plates, films, and optical fiber coatings, etc., and is widely ...

Claims

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