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Epoxy resin composition for prepreg, carbon fiber prepreg and carbon fiber compound material

A technology of epoxy resin and prepreg

Inactive Publication Date: 2015-10-21
ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In prepregs with epoxy resin as the main raw material, in order to improve the impact resistance of the prepared composite materials, liquid carboxyl-terminated nitrile rubber (CTBN) is usually used for toughening, and solid CTBN is also used to further reduce the prepreg. Resin fluidity, however, the viscosity of the epoxy resin system increases after the rubber is added, resulting in poor wettability of the epoxy resin prepreg to the reinforced fiber, which affects the interfacial bonding ability between the reinforced fiber and the resin, and further leads to the deterioration of the reinforced fiber composite material. The mechanical properties are poor

Method used

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  • Epoxy resin composition for prepreg, carbon fiber prepreg and carbon fiber compound material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Pour 100g of epoxy resin E-51 into the speed-adjustable disperser, add 10g of carboxy-terminated polynitrile liquid rubber, 10g of modified epoxy resin, and 10g of dicyandiamide in turn, stir and disperse evenly, and then add 35g of aromatic amines The curing agent was dispersed for 30 minutes to obtain an epoxy resin composition;

[0067] The prepared epoxy resin composition is evenly coated on the release paper, and then the epoxy resin composition is heated and melted to impregnate the carbon fiber material to obtain a carbon fiber prepreg, and the epoxy resin content in the prepreg is 50%.

[0068] The carbon fiber prepreg was cured in a molding machine at 165°C for 60 minutes to obtain a carbon fiber composite material.

[0069]The present invention tests the tensile properties, flexural strength, compressive strength and plane shear strength of carbon fiber composite materials according to "GB / T 28461-2012 Carbon Fiber Prepreg Standard", and the results are shown ...

Embodiment 2

[0071] Pour 100g of epoxy resin E-51 into the speed-adjustable disperser, add 10g of carboxy-terminated polynitrile liquid rubber, 10g of modified epoxy resin, and 10g of dicyandiamide in turn, stir and disperse evenly, and then add 30g of polyetheramine D-2000 and 15g polyetheramine D-400 were dispersed for 30 minutes to obtain an epoxy resin composition;

[0072] The prepared epoxy resin composition is evenly coated on the release paper, and then the epoxy resin composition is heated and melted to impregnate the carbon fiber material to obtain a carbon fiber prepreg, and the epoxy resin content in the prepreg is 30%.

[0073] The carbon fiber prepreg was cured in a molding machine at 165°C for 60 minutes to obtain a carbon fiber composite material.

[0074] The present invention tests the tensile properties, flexural strength, compressive strength and plane shear strength of carbon fiber composite materials according to "GB / T 28461-2012 Carbon Fiber Prepreg Standard", and th...

Embodiment 3

[0076] Pour 70g of epoxy resin E-51 and 30g of epoxy resin F-51 into the adjustable speed disperser, add 10g of carboxy-terminated polynitrile liquid rubber, 10g of modified epoxy resin, and 10g of dicyandiamide in order to stir and disperse evenly , and then add 30g polyetheramine D-2000 and 15g polyetheramine D-400 to disperse for 30min to obtain an epoxy resin composition;

[0077] The prepared epoxy resin composition is evenly coated on the release paper, and then the epoxy resin composition is heated and melted to impregnate the carbon fiber material to obtain a carbon fiber prepreg, and the epoxy resin content in the prepreg is 35%.

[0078] The carbon fiber prepreg was cured in a molding machine at 165°C for 60 minutes to obtain a carbon fiber composite material.

[0079] The present invention tests the tensile properties, flexural strength, compressive strength and plane shear strength of carbon fiber composite materials according to "GB / T 28461-2012 Carbon Fiber Prepr...

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Abstract

The invention provides an epoxy resin composition for prepreg. The epoxy resin composition comprises epoxy resins, modified epoxy resins and a curing agent; liquid rubber comprises one kind or several kinds of carboxyl nitrile liquid rubber, hydroxy-terminated copolybutadiene butyronitrile liquid rubber, hydroxy-terminated copolybutadiene polybutadiene liquid rubber, carboxyl terminated polybutadieneliquid rubber, hydroxyterminated copolybutadiene polyisoprene liquid rubber, carboxyl terminated polyisoprene liquid rubber, polyurethane modified liquid rubber, liquid silicon rubber and liquid polysulfide rubber. The liquid rubber is used for modifying an epoxy resin basal body, so that the binding force between a system for using epoxy resins as basal bodies, and a carbon fiber material interface is improved, and the mechanical property of the fibers is further improved. The invention further provides carbon fiber prepreg and a carbon fiber compound material. The stretching strength of the carbon fiber compound material provided by the invention at 0 degree (or in the radial direction) is 2.4GPa, the bending strength is 1320MPa, and the plane cutting strength is 70.3MPa.

Description

technical field [0001] The invention belongs to the technical field of fiber composite materials, and in particular relates to an epoxy resin composition for a prepreg and a carbon fiber prepreg-based carbon fiber composite material. Background technique [0002] Prepreg is a composition of resin matrix and reinforcing fiber made by impregnating continuous fiber or fabric with resin matrix, and is an intermediate material for the production of composite materials. Compared with the direct molding process, the resin content of the composite material produced by prepreg is more accurate, so the quality of the product is more stable, and it is currently the preferred molding process for composite material manufacturers at home and abroad. [0003] At present, glass fibers, carbon fibers, and boron fibers are mainly used as reinforcing fibers. Among them, carbon fiber composite materials have high specific strength, specific modulus, corrosion resistance, friction resistance, fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L13/00C08L15/00C08L83/04C08L81/04C08G59/50B32B27/04B32B27/38
Inventor 马文涛吴泓辉丁清华
Owner ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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