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Three-dimensional orthogonal woven fabric reinforced PMR type polyimide composite material production method

A production method and polyimide technology, applied in the field of polyimide composite materials, can solve the problems of reducing the porosity of composite material products, and achieve the effects of strong impact resistance, difficult delamination, and good structural integrity

Inactive Publication Date: 2011-12-14
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, lower alcohol is used as a solvent, which has a lower boiling point and is easy to remove during processing, reducing the porosity of composite products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The basalt fiber is woven into a three-dimensional orthogonal woven fabric preform on a three-dimensional orthogonal loom, the volume fraction of the warp direction fiber of the three-dimensional orthogonal woven fabric preform is 20%, the volume fraction of the weft direction fiber is 26%, and the volume fraction of the thickness direction fiber is 2%. Referring to the size of the hot pressing mold, cut the three-dimensional orthogonal woven fabric of the corresponding size. Mix 20 parts by weight of 3,3',4,4'-benzophenonetetraacid dianhydride (BTDA) with 60 parts by weight of absolute ethanol, heat and reflux at 78°C for 3 hours to obtain 3,3',4,4 '-Diethyl benzophenone tetraate (BTDE). 15 parts by weight of end-capping agent norbornene dioic anhydride (NA) was heated and refluxed for 2 hours at 78° C. in 40 parts by weight of dehydrated alcohol to obtain corresponding 5-norbornene-2,3-dicarboxylic acid monoethyl ester (NE ). Under nitrogen protection, 30 parts by ...

Embodiment 2

[0027] Weaving carbon fiber three-dimensional orthogonal woven fabric preform on three-dimensional orthogonal loom, the volume fraction of the warp direction fiber of three-dimensional orthogonal woven fabric preform is 29%, the volume fraction of weft direction fiber is 29%, and the volume fraction of thickness direction fiber is 6%. Referring to the size of the hot pressing mold, cut the three-dimensional orthogonal woven fabric of the corresponding size. 120 parts by weight of 3,3',4,4'-benzophenonetetraacid dianhydride (BTDA) was heated to reflux at 78°C for 6 hours in 200 parts by weight of absolute ethanol to obtain 3,3',4,4'- Diethyl benzophenone tetraate (BTDE). Heat 100 parts by weight of the end-capping agent norbornene dioic anhydride (NA) in 150 parts by weight of absolute ethanol at 78° C. to reflux for 2-4 hours to obtain the corresponding monoethyl 5-norbornene-2,3-dicarboxylate (NE). Under nitrogen protection, 150 parts by weight of 4,4'-diphenylaminomethane...

Embodiment 3

[0031] Weaving glass fiber three-dimensional orthogonal woven fabric preform on the three-dimensional orthogonal loom, the volume fraction of warp direction fiber of three-dimensional orthogonal woven fabric preform is 22%, the volume fraction of weft direction fiber is 28%, and the volume fraction of thickness direction fiber is 4%. Referring to the size of the hot pressing mold, cut the three-dimensional orthogonal woven fabric of the corresponding size. Heat 80 parts by weight of 3,3',4,4'-benzophenonetetraacid dianhydride (BTDA) in 190 parts by weight of absolute ethanol at 78°C for 4.5 hours to obtain 3,3',4,4'- Diethyl benzophenone tetraate (BTDE). Heat reflux at 78° C. for 3 hours in 100 parts by weight of absolute ethanol to obtain 5-norbornene-2,3-dicarboxylic acid monoethyl ester (NE). Under nitrogen protection, 73 parts by weight of 4,4'-diphenylaminomethane (MDA) was dissolved in 90 parts by weight of absolute ethanol. The anhydrous ethanol solution of the above...

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PUM

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Abstract

The invention provides a kind of production method of three-dimensional orthogonal woven fabric reinforced PMR type polyimide composite material, it is characterized in that, concrete steps are: the first step: make three-dimensional orthogonal woven fabric prefabricated part; Second step: Mix aromatic tetra-acid dianhydride with lower alcohol to generate aromatic dianhydride diester solution; mix reactive end group agent with lower alcohol to generate carboxylic acid monoester solution; under nitrogen protection, mix aromatic diamine with lower Mix with alcohol, add the above-mentioned aromatic dianhydride diester solution and carboxylic acid monoester solution, stir, and rotate to evaporate to obtain the resin matrix prepolymer solution; the third step: immerse the three-dimensional orthogonal woven fabric preform obtained in the first step into the second Gradient heating in the resin matrix prepolymer solution obtained in the second step; the fourth step: hot pressing. The three-dimensional orthogonal woven fabric reinforced polyimide high-temperature-resistant composite material has good structural integrity, strong impact resistance, and is not easy to delaminate. It can be used in aviation, aerospace, precision machinery and other fields as a structural material for lightweight high-temperature-resistant components.

Description

technical field [0001] The invention relates to a production method of a three-dimensional orthogonal woven fabric reinforced PMR polyimide composite material, belonging to the technical field of polyimide composite materials. Background technique [0002] Fiber-reinforced polymer matrix composites have high specific strength, specific modulus, and good fatigue resistance. Which occupies a certain proportion. Traditional fiber-reinforced polymer matrix composites have poor performance in the thickness direction, easy delamination, poor impact resistance, and low damage tolerance. The three-dimensional orthogonal woven fabric preform introduces fibers along the thickness direction, which greatly improves the performance along the thickness direction, and overcomes the disadvantages of easy delamination of traditional fiber-reinforced polymer matrix composites. [0003] The higher the speed of the aircraft, the higher the requirements for the specific strength and specific m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08K7/02C08J5/04
Inventor 谢剑飞张迎晨薛晶姚澜邱夷平
Owner DONGHUA UNIV