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Method using epoxy resin liquid crystal to modifying nylon performance

A technology of epoxy resin and modified nylon, which is applied in the performance field of liquid crystal epoxy resin modified nylon, can solve various problems, and achieve the effects of improving high temperature resistance, reducing costs, and reducing processing temperature

Inactive Publication Date: 2014-03-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, liquid crystal epoxy resin modification is mainly used to modify conventional epoxy resin. For different types of substances, such as nylon 66 modification, there has not been any report yet, and the method and mechanism of liquid crystal epoxy resin modified nylon properties are similar to Modified epoxy resins are completely different

Method used

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  • Method using epoxy resin liquid crystal to modifying nylon performance
  • Method using epoxy resin liquid crystal to modifying nylon performance
  • Method using epoxy resin liquid crystal to modifying nylon performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Liquid crystal epoxy bis(4‐(2,3‐glycidoxy)benzoic acid)‐3,3',5,5'‐tetramethoxybiphenyl‐4,4'‐diester with nylon 66 The mixture was weighed in proportion and mixed uniformly, wherein the amount of liquid crystal epoxy resin accounted for 5% by mass of the mixture. The structural formula of bis(4‐(2,3‐glycidoxy)benzoic acid)‐3,3',5,5'‐tetramethoxybiphenyl‐4,4'‐diester is:

[0028]

[0029] Step 1: first mix bis(4‐(2,3‐glycidoxy)benzoic acid)‐3,3',5,5'‐tetramethoxybiphenyl‐4,4'‐diester and nylon 66 is called according to the mass percentage of bis(4‐(2,3‐glycidoxy)benzoic acid)‐3,3',5,5'‐tetramethoxybiphenyl‐4,4'‐diester at 5% Mix well and dry in a blast oven at 70°C for 24 hours. Dry in a forced air oven at 70°C for 24 hours. Dry in a blast oven at 60°C for 20 hours

[0030] Step 2: Put the blend into Haake rheometer (HAAKE400P) for banburying. The banburying temperature is 265°C. When the material starts to be added into the mixing chamber of the rheometer, it is ...

Embodiment 2

[0037] Liquid crystal epoxy bis(4‐(2,3‐glycidoxy)benzoic acid)‐3,3',5,5'‐tetramethylbiphenyl‐4,4'‐diester and nylon 66 mixture Weigh and mix uniformly according to the proportion, wherein the amount of liquid crystal epoxy resin is respectively 10% by mass. The structural formula of bis(4‐(2,3‐glycidoxy)benzoic acid)‐3,3',5,5'‐tetramethylbiphenyl‐4,4'‐diester is:

[0038]

[0039]In step 1, bis(4‐(2,3‐glycidoxy)benzoic acid)‐3,3',5,5'‐tetramethylbiphenyl‐4,4'‐diester and nylon 66 are prepared according to the Bis(4‐(2,3‐glycidoxy)benzoic acid)‐3,3',5,5'‐tetramethylbiphenyl‐4,4'‐diester mass percentage 3%‐10% Mix well and dry in a blast oven at 70°C for 24 hours. Dry in a blast oven at 60°C for 20 hours

[0040] Step 2: Put the blend into Haake rheometer (HAAKE 400P) for banburying. The banburying temperature is 260°C. When the material starts to be added into the mixing chamber of the rheometer, it is observed that the torque gradually rises and a sharp torque peak appe...

Embodiment 3

[0047] Liquid crystal epoxy resin N,N'‐di(4‐(2,3‐glycidoxy)‐phenylmethylene)‐2,2,3,3',5,5',6,6' The mixture of ‐octafluorobiphenyl‐4,4'‐diamine and nylon 66 is weighed and mixed uniformly in proportion, and the amount of liquid crystal epoxy resin is 7% by mass. N,N'‐bis(4‐(2,3‐glycidoxy)‐phenylmethylene)‐2,2,3,3',5,5',6,6'‐octafluorobi The structural formula of benzene‐4,4'‐diamine is:

[0048]

[0049] Step 1: First N,N'-bis(4-(2,3-glycidoxy)-phenylmethylene)-2,2,3,3',5,5',6,6 '‐octafluorobiphenyl‐4,4'‐diamine and nylon 66 according to N,N'‐di(4‐(2,3‐glycidoxy)‐phenylmethylene)‐2,2, The mass fraction of 3,3',5,5',6,6'-octafluorobiphenyl-4,4'-diamine is 7%, weighed, mixed evenly and dried in a blast oven at 60°C for 20 hours.

[0050] Step 2: Put the blend into Haake rheometer (HAAKE 400P) for banburying. The banbury temperature is 270°C. When the material starts to be added into the mixing chamber of the rheometer, it is observed that the torque gradually rises and a ...

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Abstract

The invention discloses a method using epoxy resin liquid crystal to modifying nylon performance. The method comprises the following steps: epoxy resin liquid crystal and nylon 66 are uniformly mixed and dried; the blend is added into a Haake rheometer for banburying; after banburying for 8-15 minutes in Haake rheometer at 260-270 DEG C, the material is discharged and cooled at room temperature, and then is stored in sealing bags; the mass of the epoxy resin liquid crystal is 5-10% of that of the mixture; the epoxy resin liquid crystal is blended with a crystal high-molecular material whose main chain contains proton donor or the like, and at a certain temperature, the epoxy resin liquid crystal is introduced into polymer side chain, thereby reducing melting temperature of the polymer itself, and improving processing performance of the material itself. the melting temperature of modified nylon can be reduced to 231.1 DEG C at the lowest, which is 20 DEG C lower than that of the pure nylon 66. The initial decomposition temperature can be increased to 366.1 DEG C at the highest, which is 8 DEG C higher than that of the pure nylon 66.

Description

technical field [0001] The invention relates to the application of a class of liquid crystal epoxy resin, in particular to a method for modifying the properties of nylon with liquid crystal epoxy resin. Background technique [0002] Liquid crystal epoxy resin, that is, usually refers to the epoxy compound containing a rigid rod-shaped aromatic group mesogen. It exhibits liquid crystallinity in a certain temperature range. Liquid crystal epoxy resin has the orderliness of liquid crystal molecules, and there are active epoxy groups in the molecular chain, and is widely used in modified epoxy resins. Cai Zhiqi, Sun Jianzhong and others (Journal of Chemical Engineering of Chinese Universities, 23(3), 2009, 510; Journal of Polymer Science, Part A: Polymer Science: 2007, 45, 727) reported the synthesis of a new type of liquid crystal epoxy resin, 4,4' ‐bis(4‐hydroxybenzyloxy)‐3,3',5,5'‐tetramethylbiphenyl diglycidyl ether (DEG‐TMBPBHB), through a five-step organic synthesis rout...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L63/00C08J3/24
CPCC08L77/06C08J3/246C08J2377/06C08J2463/00C08L2201/08C08L2205/12C08L2312/00C08L63/00
Inventor 蔡智奇梅双陈慧琴陆园文秀芳程江
Owner SOUTH CHINA UNIV OF TECH
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