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Hyperbranched polyimide containing anthracene structure and preparation method and application thereof

Inactive Publication Date: 2019-01-22
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with linear polyimide materials, the distance between hyperbranched polyimide molecular chains is large, which improves its solubility, but its heat resistance is relatively reduced, which limits its application in aerospace, aerospace vehicle structures or functional parts and Wide application in the fields of parts and components of rockets and missiles

Method used

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  • Hyperbranched polyimide containing anthracene structure and preparation method and application thereof
  • Hyperbranched polyimide containing anthracene structure and preparation method and application thereof
  • Hyperbranched polyimide containing anthracene structure and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Add 0.4362g (2mmol) of pyromellitic dianhydride (PMDA) and 36ml of N,N-dimethylformamide into a three-necked flask, blow in argon, raise the temperature to 30°C, and add the triamine monomer 4,4' ,4”-(anthracene-1,9,10-triyl)trianiline 0.4516g (1mmol) was dissolved in 40ml of N,N-dimethylformamide and evenly dropped into the three-necked flask with a constant pressure dropping funnel in 1~2h, Then continue to react for 12 hours, then add 6ml of acetic anhydride and 2ml of triethylamine, heat up to 45°C and continue to react for 10h, after the reaction is completed and cooled to room temperature, discharge the material in ethanol, filter, wash, repeat 2 to 3 times, and finally place in 80 ℃ in a vacuum drying oven for 24 hours to obtain a reddish-brown hyperbranched polyimide polymer, whose structural formula is as follows:

[0041]

Embodiment 2

[0043] Add 0.4515g (2.07mmol) of pyromellitic dianhydride (PMDA) and 15ml of N,N-dimethylacetamide into a three-necked flask, blow in argon, raise the temperature to 30°C, and dilute the triamine monomer 4,4 Dissolve ',4"-(anthracene-2,9,10-triyl)trianiline 0.4516g (1mmol) into 16ml of N,N-dimethylacetamide and drop evenly into the three-necked flask with a constant pressure dropping funnel in 1~2h , then continue to react for 14 hours, then add 6.2ml of acetic anhydride and 2.1ml of triethylamine, heat up to 45°C and continue to react for 14 hours, after the reaction is completed, cool to room temperature and discharge the material in methanol, filter, wash, repeat 2 to 3 times, and finally Place it in a vacuum drying oven at 80°C for 24 hours to obtain a light brown hyperbranched polyimide polymer, whose structural formula is as follows:

[0044]

Embodiment 3

[0046]Add 0.4413g (1.5mmol) of 3,3',4,4'--biphenyltetracarboxylic dianhydride (BPDA) and 10ml of N-methylpyrrolidone into a three-necked flask, pass in argon, raise the temperature to 30°C, and Triamine monomer 5,5',5"-(anthracene-2,6,9-triyl)tris(thiophen-2-amine) 0.4696g (1mmol) dissolved in 8ml N-methylpyrrolidone using a constant pressure dropping funnel Evenly drop into the three-necked flask in 1~2h, then continue to react for 20h, then add 12ml of acetic anhydride and 3ml of triethylamine, heat up to 45°C and continue to react for 10h, after the reaction is completed, cool to room temperature and discharge in methanol, filter and wash , repeated 2 to 3 times, and finally dried in a vacuum oven at 80°C for 24 hours to obtain a brown hyperbranched polyimide polymer, whose structural formula is as follows:

[0047]

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Abstract

The invention discloses hyperbranched polyimide containing an anthracene structure and a preparation method and application thereof. The hyperbranched polyimide material is prepared by imidization using a triamine containing an anthracene ring structure and various tetracid dianhydrides as raw materials. The hyperbranched polyimide has high glass-transition temperature and thermal stability, goodoptical performance and good solubility. The synthesis method of the invention is simple and diverse in process and is suitable for industrial production. The hyperbranched polyimide disclosed in theinvention has a good application prospect in the field of high temperature resistance, photosensitivity, optical waveguide, gas permeation separation membranes, etc.

Description

technical field [0001] The invention relates to the field of material science, in particular to a hyperbranched polyimide containing anthracene structure and its preparation method and application. technical background [0002] Polyimide refers to a class of polymers containing imide rings on the main chain. According to the different molecular structures, it can be divided into aromatic polyimide and aliphatic polyimide. Among them, aromatic polyimide is known for its low dielectric properties, high mechanical properties, easy preparation, and especially high thermal stability; however, its solubility and processability are poor. [0003] In recent years, researchers have introduced branched structures into polyimides to prepare hyperbranched polyimides (HBPIs) to improve the solubility and processability of aromatic polyimides. Hyperbranched polyimide combines the advantages of both polyimide and hyperbranched polymer and has a series of excellent comprehensive propertie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10
CPCC08G73/1039C08G73/1064C08G73/1067
Inventor 谭井华陈成亮刘亦武佘志鸿
Owner HUNAN UNIV OF TECH
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