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A kind of hyperbranched polyimide containing benzothiazole structure and its preparation method and application

A technology of polyimide and benzothiazole, which is applied in the field of material science, can solve the problems of restricting wide application, large distance between chains, and decreased heat resistance, so as to achieve good application prospects, improve heat resistance, and increase freedom volume effect

Active Publication Date: 2021-01-08
江西有泽新材料科技有限公司
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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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  • A kind of hyperbranched polyimide containing benzothiazole structure and its preparation method and application
  • A kind of hyperbranched polyimide containing benzothiazole structure and its preparation method and application
  • A kind of hyperbranched polyimide containing benzothiazole structure and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0038] 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 N 1 -(4-aminophenyl)-N 1 -(6-(4-aminophenyl)benzo[d]thiazol-2-yl)benzene-1,4-diamine 0.4235g (1mmol) was dissolved in 40ml N,N-dimethylformamide with constant pressure dropping funnel 1~2h, evenly drop into the three-necked flask, then continue to react for 14h, then add 6ml of acetic anhydride and 2ml of triethylamine, heat up to 45°C and continue to react for 12h, after the reaction is completed, cool to room temperature and discharge in ethanol, 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 brown hyperbranched polyimide polymer, whose structural formula is as follows:

[0039]

Embodiment 2

[0041] 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 add the triamine monomer N 2 -(5-(4-aminophenyl)benzo[d]thiazol-2-yl)-N 2 -(5-aminothiophen-2-yl)thiophene-2,5-diamine 0.4356g (1mmol) was dissolved in 16ml of N,N-dimethylacetamide and added dropwise into the three-necked flask with a constant pressure dropping funnel in 1~2h, Then continue to react for 16h, then add 6.2ml of acetic anhydride and 2.1ml of triethylamine, heat up to 45°C and continue to react for 16h, after the reaction is completed, cool to room temperature and discharge the material in ethanol, filter, wash, repeat 2 to 3 times, and finally place Dried in a vacuum oven at 80°C for 24 hours to obtain a reddish-brown hyperbranched polyimide polymer, whose structural formula is as follows:

[0042]

Embodiment 3

[0044] Add 0.4413g (1.5mmol) of 3,3',4,4'--biphenyltetracarboxylic dianhydride (BPDA) and 20ml of N-methylpyrrolidone into a three-necked flask, pass in argon, raise the temperature to 30°C, and Triamine Monomer N 2 -(6-aminonaphthalen-2-yl)-N 2 -(7-(4-aminophenyl)benzo[d]thiazol-2-yl)naphthalene-2,6-diamine 0.5237g (1mmol) dissolved in 26.5ml N-methylpyrrolidone using a constant pressure dropping funnel at 1~ Evenly drop into the three-necked flask for 2 hours, then continue to react for 20 hours, then add 12ml of acetic anhydride and 3ml 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 in methanol, filter, wash, repeat 2 ~3 times, and finally placed in a vacuum drying oven at 80°C for 24 hours to obtain a light yellow hyperbranched polyimide polymer, whose structural formula is as follows:

[0045]

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Abstract

The invention discloses a hyperbranched polyimide containing a benzothiazole structure and a preparation method and application thereof. The hyperbranched polyimide material is prepared through imidization with triamine containing a benzothiazole structure and various tetracarboxylic dianhydrides as raw materials. The hyperbranched polyimide has high glass transition temperature and heat stability, good optical performance and good solubility. The synthesis method is simple and diverse in technology, thereby being suitable for industrial production. The hyperbranched polyimide has good application prospects in the field of high temperature resistance and the fields of photosensitive materials, optical waveguides and gas permeation separation membranes.

Description

technical field [0001] The invention relates to the field of material science, in particular to a hyperbranched polyimide containing a benzothiazole structure and a preparation method thereof. [0002] technical background [0003] Polyimide (PI) is a kind of polymer material with imide ring as the characteristic structure and excellent performance. Most of them cannot be melted or have extremely high melting temperature, insoluble in organic solvents, and difficult to process and shape. So how to make PI have good processing performance has been a research hotspot in this field. [0004] At present, the main means to improve the processing performance of polyimide is to introduce hyperbranched structure. Hyperbranched polymers have a highly branched structure, and the molecular chains are loose. Compared with linear polymers, the entanglement effect between the molecular chains of hyperbranched polymers is small, and its molecular structure is three-dimensional. So the flu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/10C08J5/18C08L79/08
CPCC08G73/1039C08G73/1064C08G73/1067C08J5/18C08J2379/08
Inventor 谭井华彭思梅刘亦武佘志鸿
Owner 江西有泽新材料科技有限公司
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