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Prepreg and Carbon Fiber Reinforced Composites

A prepreg and carbon fiber technology, which is applied in the field of prepreg and carbon fiber reinforced composite materials, can solve the problems of insufficient effect and insufficient effect of I-type interlayer toughness, and achieve the effect of excellent tensile strength

Active Publication Date: 2022-05-13
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to improve the toughness of the matrix resin, there is a method of blending a rubber component into the matrix resin (see Patent Document 1), and a method of blending a thermoplastic resin (see Patent Document 2), but no sufficient effect can be obtained.
In addition, a method of inserting an adhesive layer called an interleaf or a shock absorbing layer between layers (see Patent Document 3) and a method of reinforcing the interlayer with particles (see Patent Document 4) have been proposed. method, but although it has an effect on type II interlaminar toughness, it cannot obtain a sufficient effect on type I interlaminar toughness

Method used

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  • Prepreg and Carbon Fiber Reinforced Composites
  • Prepreg and Carbon Fiber Reinforced Composites
  • Prepreg and Carbon Fiber Reinforced Composites

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、7、 comparative example 2

[0255] According to the compounding ratios in Tables 1 and 2, a resin composition for carbon fiber-reinforced composite materials was produced through the preparation procedure of the above-mentioned (5) resin composition. Using the obtained resin composition, a prepreg was obtained by the above (10) production step of a prepreg using a fiber base material. Using the obtained prepreg, the above-mentioned (11) type I interlaminar toughness (G IC ) and Type II interlaminar toughness (G IIC ) Forming method and measurement of flat plate made of composite material for test, (12) Preparation and measurement of flat plate made of composite material for 0° tensile strength test by compression molding, (13) Observation by polarizing optical microscope, (14) Using Measurement of diffraction angle 2θ by X-ray diffraction, (15) Measurement of anisotropy in a resin composition by polarizing Raman spectroscopy. The results are shown in Tables 1 and 2.

Embodiment 2～6、8、 comparative example 1、3～5

[0257] According to the compounding ratios in Tables 1 and 2, the resin composition for carbon fiber reinforced composite material was produced through the preparation procedure of the above (5) resin composition. Using the obtained resin composition, a prepreg was obtained by the above (6) prepreg production step. Using the obtained prepreg, the above-mentioned (7) Type I interlaminar toughness (G IC ) Fabrication of flat panels made of composite materials for testing and G IC Determination, (8) Type II interlaminar toughness (G IIC ), (9) Fabrication and measurement of flat plates made of composite materials for 0° tensile strength test, (13) Observation using polarized optical microscope, (14) Measurement of diffraction angle 2θ using X-ray diffraction, (15) Using polarized light Determination of anisotropy in resin compositions by Raman spectroscopy. The results are shown in Tables 1 and 2.

[0258] The various measurement results of the examples are shown in Tables 1 ...

Embodiment 9～11、34、 comparative example 7

[0261] According to the compounding ratios in Tables 3 and 6, the resin composition for carbon fiber-reinforced composite materials was produced through the preparation procedure of the above-mentioned (5) resin composition.

[0262] In addition, a prepreg was produced through the step of (10) producing a prepreg using a fiber base material. Using the obtained prepreg, according to the above (11) adopt the I-type interlayer toughness (G IC ) and type II interlaminar toughness (G IIC (12) The steps of making and measuring the flat plate made of composite material for the 0° tensile strength test, and the G IC , G IIC ,tensile strength. The results are shown in Tables 3 and 6.

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Abstract

The present invention provides a prepreg and a carbon fiber reinforced composite material capable of obtaining a carbon fiber reinforced composite material having excellent Type I interlayer toughness and Type II interlayer toughness and tensile strength. The prepreg comprises the following components [A] to [C], and the resin composition comprising the components [B] and [C] has a diffraction angle 2θ=1.0° after curing that is observed by X-ray diffraction. ~6.0° corresponds to a high-order structure. [A]: Carbon fiber [B]: Epoxy resin [C]: Curing agent for [B].

Description

technical field [0001] The present invention relates to a prepreg capable of obtaining a carbon fiber-reinforced composite material having excellent interlaminar toughness and tensile strength, and a carbon fiber-reinforced composite material. Background technique [0002] Conventionally, fiber-reinforced composite materials composed of reinforcing fibers such as carbon fibers and glass fibers and thermosetting resins such as epoxy resins and phenolic resins are lightweight, and have excellent mechanical properties such as strength and rigidity, heat resistance, and corrosion resistance, so they are used Used in various fields such as aviation / cosmos, automobile, railway vehicle, ship, civil construction and sporting goods. In particular, for applications requiring high performance, fiber-reinforced composite materials using continuous reinforcing fibers are used. As reinforcing fibers, carbon fibers with excellent specific strength and specific elastic modulus are often use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/24
CPCC08J5/042C08J2363/02C08J5/243C08J5/249C08L63/00C08K7/06C08K3/04C08J2363/00C08G59/28C08G59/5033C08G59/38C08G59/24
Inventor 新井厚仁古川浩司杉本笃希三野真弘三原真由美
Owner TORAY IND INC