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Novel phosphorus-containing thermotropic liquid crystal copolyester and preparation method and application thereof

A technology of thermotropic liquid crystal and copolyester, applied in liquid crystal materials, chemical instruments and methods, etc., can solve problems such as the limitation of application scope, and achieve the effect of simple method, improved mechanical properties and thermal stability, and easy operation.

Inactive Publication Date: 2012-07-18
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a specific reaction atmosphere is required in the thermotropic liquid crystal synthesis process, and the prepared composite materials are mostly used in fiber materials, so the application range is still limited.

Method used

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  • Novel phosphorus-containing thermotropic liquid crystal copolyester and preparation method and application thereof
  • Novel phosphorus-containing thermotropic liquid crystal copolyester and preparation method and application thereof
  • Novel phosphorus-containing thermotropic liquid crystal copolyester and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Phosphorus-containing thermotropic liquid crystal copolyester as shown in formula I, its preparation method is as follows:

[0064] Weigh 6.6g of p-hydroxybenzoic acid and dissolve it in 100ml, 1mol / L NaOH solution, and place it in a 500ml three-necked flask as the water phase. Dissolve 4.06g of terephthaloyl chloride in 50ml of CCl 4 as the organic phase. Add the organic phase dropwise to the water phase with a stirring device at room temperature, add hydrochloric acid to pH = 3 after reacting for 4 hours, filter the precipitate, wash with deionized water and acetone several times, and dry in vacuum to obtain a compound dibasic acid;

[0065] Add 5g of complex dibasic acid, 50ml of thionyl chloride and 0.02ml of N, N-dimethylformamide into a three-necked flask equipped with magnetic stirring, reflux condenser, drying tube and tail gas absorption device, and under reflux temperature After reacting for 9 hours, distill off excess thionyl chloride under normal pressure,...

Embodiment 2

[0070] The phosphorous-containing thermotropic liquid crystal copolyester was prepared according to the steps in Example 1, but the analytically pure grade raw materials in Example 1 were replaced with industrial grade raw materials.

Embodiment 3

[0072] The ABS was placed in a blast drying oven, and dried at 80° C. for 2 to 4 hours; the P-TLCP synthesized in Example 1 was placed in a vacuum drying oven, and dried at 120° C. for 2 to 4 hours. The dried ABS and P-TLCP were kneaded by a double-roll mill for 10 minutes at a mass ratio of 100:5 (the temperatures of the front and rear rolls were 180°C and 170°C, respectively). After the kneading is completed, stack the blanks into the mold, move them into a flat vulcanizing machine, and press at 180°C and 15MPa for 420s. Finally, the samples were taken out, cold-pressed, made into standard samples, and various performance tests were carried out.

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Abstract

Phosphorus-containing thermotropic liquid crystal copolyester is formed by polycondensation synthesis of composite binary chloride and phosphorus-containing phenols monomers in solution by using an acyl chloride method. A main chain of the phosphorus-containing thermotropic liquid crystal copolyester is provided with a mesomorphic unit, and a side chain comprises an antiflaming element phosphorus. The novel aromatic thermotropic liquid crystal copolyester does not only have excellent performance of thermotropic liquid crystals, but also has a certain antiflaming effect simultaneously. The phosphorus-containing thermotropic liquid crystal copolyester can be applied to acrylonitrile butadiene styrene (ABS) resin to prepare ABS-enhanced composite materials of phosphorus-containing thermotropic liquid crystal copolyester. The composite materials have good mechanical properties, thermal stability properties and antiflaming effects.

Description

technical field [0001] The invention belongs to the field of material modification, and specifically relates to a phosphorus-containing thermotropic liquid crystal copolyester, a preparation method thereof and an application of reinforced ABS composite materials. Background technique [0002] Thermotropic liquid crystal polymer (TLCP) itself has good mechanical properties and processing properties, such as high strength, high modulus, self-reinforcement, outstanding heat resistance and excellent corrosion resistance, etc., and can be formed with thermoplastic resins Composite materials, endowing composite materials with excellent mechanical properties. In recent years, the research on TLCP composite materials has become a hot spot in the modification of polymer materials, and is considered to be a new type of polymer materials with broad prospects. [0003] ABS resin is a copolymer of acrylonitrile, butadiene and styrene monomers. It has good mechanical properties, electric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/692C08L67/02C08L55/02C08K5/526C09K19/38
Inventor 夏英吕枭枭张丹李婷婷翁伟明葛雪明
Owner DALIAN POLYTECHNIC UNIVERSITY
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