Polyimide-based traction belt

A technology of polyimide-based traction and polyimide resin, which is applied in the field of traction belts, can solve the problems of restricting the application of composite material traction belts, low heat resistance level, poor mechanical properties and environmental adaptability, etc.

Inactive Publication Date: 2019-09-17
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional composite traction belts generally use general-purpose engineering plastics as the resin matrix. General-purpose engineering plastics have problems such as solvent resistance, low heat resistance, poor mechanical properties and environmental adaptability.
Moreover, there are few composite traction belts resistant to radiation at present, which limits the application of composite traction belts in high-tech fields.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Prepare polyimide resin according to the following method

[0075] Add 4.997kg (9.6mol) of bisphenol A diether dianhydride and 0.973kg (9mol) of m-phenylenediamine to a 100-liter reactor equipped with mechanical stirring, nitrogen protection, water and condensing reflux device, formula II- 0.32 kg (1 mol) of diamine with the structure shown in 1, 0.118 kg (0.8 mol) of terephthalic anhydride, and 40 kg of N,N-dimethylacetamide (DMAc), reacted at room temperature for 12 hours to obtain a polyamic acid solution. Add 10 kg of xylene to the obtained polyamic acid solution, reflux at 160° C. with water for 5 hours, filter, wash with ethanol 4 times, and dry at 200° C. for 10 hours to finally obtain polyimide resin powder.

[0076] Composite traction belt is prepared according to the following method

[0077] The 24k carbon fiber is drawn out from the creel shaft by the haul-off machine, spread evenly through the spreading roller, enters the impregnation tank after being preh...

Embodiment 2

[0081] Prepare polyimide resin according to the following method

[0082] Add 4.997kg (9.6mol) of bisphenol A diether dianhydride and 0.973kg (9mol) of p-phenylenediamine to a 100-liter reactor equipped with mechanical stirring, nitrogen protection, water and condensing reflux device, formula II- 0.32 kg (1 mol) of diamine with the structure shown in 4, 0.118 kg (0.8 mol) of terephthalic anhydride, and 36 kg of N,N-dimethylacetamide (DMAc) were reacted at room temperature for 12 hours to obtain a polyamic acid solution. Add 10 kg of xylene to the obtained polyamic acid solution, reflux at 165° C. with water for 5 hours, filter, wash with ethanol 4 times, and dry at 200° C. for 10 hours to finally obtain polyimide resin powder.

[0083] Composite traction belt is prepared according to the following method

[0084] The 36k carbon fiber is drawn out from the creel shaft by a haul-off machine, and the fiber is spread evenly through the spreading roller, and enters the impregnatio...

Embodiment 3

[0087] Prepare polyimide resin according to the following method

[0088] Add 4.997kg (9.6mol) of bisphenol A diether dianhydride and 0.757kg (7mol) of m-phenylenediamine to a 100-liter reactor equipped with mechanical stirring, nitrogen protection, water and condensing reflux device, formula II- 0.961 kg (3 mol) of diamine with the structure shown in 8, 0.118 kg (0.8 mol) of terephthalic anhydride, and 36 kg of N,N-dimethylacetamide (DMAc), reacted at room temperature for 12 hours to obtain a polyamic acid solution. Add 8kg of xylene to the obtained polyamic acid solution, reflux at 160°C with water for 5 hours, filter, wash with ethanol 4 times, and dry at 200°C for 10 hours to finally obtain polyimide resin powder.

[0089] Composite traction belt is prepared according to the following method

[0090] The 50k carbon fiber is drawn out from the creel shaft by the haul-off machine, and the fiber is spread evenly through the spreading roller, and enters the impregnation tank ...

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Abstract

A polyimide-based traction belt is prepared by leading out and uniformly unfolding and preheating untwisted continuous fibers, completely impregnating polyimide resin into the untwisted continuous fibers, and shaping to obtain polyimide-based traction belt. The polyimide resin is prepared by polymerizing aromatic dianhydride, aromatic diamine and terminating agent in an organic solvent to obtain a polyamic acid solution; adding non-polar aromatic hydrocarbons into polyamic acid solution, heating and cyclization and dehydration, precipitating powder, washing, drying and granulating to obtain the polyimide resin; wherein the aromatic diamine is one or more of compounds selected from the group consisting of compounds of formula II-1-Formula II-8. The traction belt has high mechanical properties, such as tensile strength; excellent ray radiation resistance. The traction belt also has the advantages of low specific gravity, high temperature resistance, long service life, low coefficient of thermal expansion, low volatile matter content in vacuum environment and so on. It can be used in the fields of aviation, spaceflight, nuclear industry, civil towing and so on.

Description

technical field [0001] The invention belongs to the technical field of traction belts, in particular to a polyimide-based traction belt. Background technique [0002] Composite traction belt refers to the traction material composed of fiber and resin. Due to its advantages of flexibility, light weight and high tensile strength, it plays an important role in traction and load bearing, and is widely used in military industry, construction, production and other fields. Commonly used resins include epoxy resin, polyester resin, polypropylene resin, polysulfone resin, polyimide resin, etc. Among them, polyimide resin is a kind of high-performance resin containing imide ring, which has high and low temperature resistance , good mechanical properties, high dimensional stability, etc., the high-performance traction belt prepared after compounding with fiber is widely used in high-tech fields. [0003] Traditional composite traction belts generally use general-purpose engineering pl...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08K7/06C08K7/14C08G73/10
CPCC08G73/1042C08G73/1071C08K7/06C08K7/14C08L79/08C08L2205/025C08L2205/16
Inventor 矫龙代学民杜志军姚海波王汉夫邱雪鹏
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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