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Modified bismaleimide carbon fiber prepreg, composite material and preparation method thereof

A bismaleimide carbon fiber and bismaleimide technology, which is applied in the field of polymer composite materials, can solve problems such as difficulty in forming, and achieve the effects of good processability, long pot life and good mechanical properties.

Pending Publication Date: 2022-04-15
长春长光宇航复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a commonly used thermosetting resin for the resin matrix of traditional composite materials, it has good manufacturability. The thermosetting resins that are easy to form include epoxy resin and cyanate resin. High-performance polyimide resin, although the service temperature can reach 300 ° C, but its molding is relatively difficult

Method used

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  • Modified bismaleimide carbon fiber prepreg, composite material and preparation method thereof
  • Modified bismaleimide carbon fiber prepreg, composite material and preparation method thereof
  • Modified bismaleimide carbon fiber prepreg, composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of preparation method of high temperature resistance, modified bismaleimide carbon fiber prepreg:

[0029] Step 1. Preparation of high temperature resistant, modified bismaleimide prepreg

[0030] Weigh and stir 4,4-bismaleimidodiphenylmethane and diallyl bisphenol A at a ratio of 2:1 by mass and number, and then further fully mix the above two by grinding;

[0031] Heating the ground components at a heating temperature of 145°C and reacting for 4 hours to obtain a prepolymer;

[0032] After prepolymerization, lower the temperature to 90°C, add bisphenol A cyanate, and continue polymerization for 20 minutes to obtain a high temperature resistant, modified bismaleimide prepreg.

[0033] Step 2. Preparation of high temperature resistant, modified bismaleimide carbon fiber prepreg

[0034] Use the high temperature resistant and modified bismaleimide prepreg obtained in step 1 to process into a film. The preparation process is: preheat the bismaleimide prepreg at 8...

Embodiment 2

[0037] The high temperature resistant, modified bismaleimide carbon fiber prepreg obtained in Example 1 is cut and laid, and then according to (130±5)°C / 2h±5min+(180±5)°C / 1h±5min+ (240±5)°C / 3h±5min gradient temperature rise, mold clamping pressure controlled at 2MPa for curing, high temperature resistant, modified bismaleimide carbon fiber composite material was obtained.

[0038] The high temperature resistant bismaleimide carbon fiber composite material prepared in Example 2 was subjected to mechanical tests at room temperature and high temperature (240° C.) using a universal testing machine. The test results are shown in Table 1. In the test, the tensile strength adopts GB / T 3354-2014, the compressive strength adopts GB / T 3856-2005, the flexural strength adopts GB / T 3356-1999, and the interlaminar shear strength adopts JC / T 773-1996.

[0039] Table 1

[0040]

[0041] As can be seen from Table 1, the tensile properties, compressive properties, flexural properties, and i...

Embodiment 3

[0043] A kind of preparation method of high temperature resistance, modified bismaleimide carbon fiber prepreg:

[0044] Step 1. Preparation of high temperature resistant, modified bismaleimide prepreg

[0045] Weigh and stir 4,4-bismaleimidodiphenylmethane and diallyl bisphenol S at a ratio of 2:1 in parts by mass, and then further thoroughly mix the above two by grinding;

[0046] Heat the ground components at a temperature of 130°C and react for 5 hours to obtain a prepolymer;

[0047] After prepolymerization, lower the temperature to 80°C, add bisphenol A cyanate, and continue polymerization for 30 minutes to obtain a high temperature resistant, modified bismaleimide prepreg.

[0048] Step 2. Preparation of high temperature resistant, modified bismaleimide carbon fiber prepreg

[0049]Use the high temperature resistant and modified bismaleimide prepreg obtained in step 1 to process into a film. The preparation process is: preheat the bismaleimide prepreg at 75°C for 36 m...

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Abstract

The invention relates to a high-temperature-resistant modified bismaleimide carbon fiber prepreg, a composite material and a preparation method thereof, and belongs to the technical field of polymer composite materials. The problems that a thermosetting resin matrix material is poor in temperature resistance and manufacturability and short in storage period are solved. The preparation method of the prepreg comprises the following steps: mixing and grinding bismaleimide and diallyl bisphenol A, adding cyanate ester resin, carrying out a polymerization reaction to obtain bismaleimide prepreg, preparing the bismaleimide prepreg into a single-layer adhesive film, introducing carbon fibers between the two layers of adhesive films, and carrying out curing to obtain the bismaleimide prepreg. The bismaleimide carbon fiber prepreg is obtained by curing the bismaleimide carbon fiber, the prepreg is good in manufacturability and long in storage life, and the bismaleimide carbon fiber composite material obtained after curing is excellent in mechanical property and good in high temperature resistance.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a modified bismaleimide carbon fiber prepreg, a composite material and a preparation method thereof. Background technique [0002] With the expanding application of advanced composite materials and the continuous updating of aviation and aerospace vehicles, many new requirements have been put forward for the resin as the matrix, and the requirements for composite materials have also been continuously improved. People hope to have excellent moisture and heat resistance. It must also have sufficient toughness and a resin matrix with superior molding processability. As a commonly used thermosetting resin for the resin matrix of traditional composite materials, it has good manufacturability. The thermosetting resins that are easy to form include epoxy resin and cyanate resin. High-performance polyimide resin, although the use temperature can reach 300...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/24C08L79/08C08L79/04C08K7/06
Inventor 商伟辉张丽颖卜凡哲
Owner 长春长光宇航复合材料有限公司
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