Toughened epoxy resin/glass fiber prepreg and preparation method

A technology for toughening epoxy resin and glass fiber, which is applied in the field of toughening epoxy resin/glass fiber prepreg and its preparation, can solve the problems of high production cost, low resin content, low mechanical strength, etc., and achieves low cost, combined with The effect of ability enhancement and toughening effect is obvious

Inactive Publication Date: 2013-06-12
CHANGZHOU LOONG TOP NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above problems often lead to low resin content, low mechanical strength and high production cost of glass fiber composite products.

Method used

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  • Toughened epoxy resin/glass fiber prepreg and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1—preparation of glass fiber woven cloth through plasma surface treatment

[0046] Specific steps are as follows:

[0047] Step 1. Glass fiber woven cloth is subjected to low temperature and atmospheric pressure plasma surface treatment

[0048] Put a roll of 5 kg pre-dried glass fiber woven cloth into the cavity of the plasma equipment, turn on the high-pressure air flow meter, adjust the pressure reducing valve, and turn on the power after the gas flow reaches an appropriate value, and adjust the discharge voltage to make the discharge After generating and stabilizing for 12 minutes, gradually reduce the output voltage of the power supply and return to zero, turn off the power supply and the gas pressure reducing valve, take out the treated glass fiber and glass fiber cloth, and set aside;

[0049] Step 2. Spray coupling agent dispersion

[0050] Preparation of coupling agent dispersion

[0051] Weigh 0.8 parts by weight of silane coupling agent vinyl t...

Embodiment 2

[0057] Example 2—Preparation of Dendrimer Functionalized Titanium Dioxide Submicron Particle Toughener

[0058] Specific steps are as follows:

[0059] Amino-terminated dendrimers G 6.0 -PAMAM-(NH 2 ) z (produced by Changchun Yinghua Institute) and titanium dioxide micro-particles are dispersed in acetone (other organic solvents can also be used, such as absolute ethanol, n-hexane, cyclohexane, toluene, etc.), and added to the reaction kettle with stirring and heating devices Among them, the titanium dioxide microparticles used here are microparticles with uniform particles obtained by hydrolysis of organic titanate. The preparation method is a method commonly used in the industry to prepare titanium dioxide microparticles. Hydrolysis occurs, and the particle size distribution of titanium dioxide microparticles obtained is narrow. By controlling the reaction conditions, the particle size can be controlled between 0.5 and 3.0 microns. The amount of titanium dioxide micropar...

Embodiment 3

[0060] Example 3—Preparation of Dendrimer Functionalized Silica Submicron Particle Toughener

[0061] Specific steps are as follows:

[0062] 0.5~3g of dendrimer G 6.0 -PAMAM-(NH 2 ) z (produced by Changchun Yinghua Institute) dispersed in 50-150ml of acetone (other organic solvents can also be used, such as absolute ethanol, n-hexane, cyclohexane, toluene, etc.), and then disperse 8-12g of nano-silica Add in 50-150ml of acetone, then add to the reaction kettle with stirring and heating device; raise the temperature of the reaction kettle to 78°C, stir and mix for more than 60 minutes; filter with suction, wash with acetone three times, and then dry, that is A dendrimer functionalized silica submicron particle toughening agent was obtained. Dendrimer G 6.0 -PAMAM-(NH 2 ) z It is a dendritic macromolecule with a hydrolyzable alkoxy silicon ester group in the center and a plurality of amino active groups at the end and can react with epoxy bisphenol A; the nano-silica is...

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Abstract

The invention relates to the field of high polymer materials, in particular to a toughened epoxy resin / glass fiber prepreg and a preparation method thereof. In a vacuum apparatus, a glass fiber cloth treated by plasmas is impregnated by toughened epoxy resin so as to form the prepreg with reinforced fiber fully impregnated by the matrix resin, wherein the resin content is greater than or equal to 15% and is less than or equal to 30%. A vacuum infusion process employed in the invention solves the problems of complex preparation process, high cost, difficult control of resin content and the like in current glass fiber prepregs. In addition, the toughened epoxy resin used in the prepreg adopts a mixed amine curing agent and a nano-toughening agent, the toughening effect is obvious, a resin cast body can have excellent properties. Under a vacuum condition, the resin cast body and the glass fiber woven cloth can be impregnated to prepare a prepreg, and after curing, the composite material obtained has excellent impact resistance.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a toughened epoxy resin / glass fiber prepreg and a preparation method thereof. Background technique [0002] Epoxy resin / glass fiber composite material is one of the most widely used composite materials at present. It has the advantages of low density (only a quarter of steel), high strength, high modulus, good corrosion resistance, and excellent electrical properties. , In addition, its raw materials have a wide range of sources, easy processing and molding, high production efficiency, and strong designability. It is an important composite material widely used in national economy and national defense construction. [0003] Although epoxy resin has the characteristics of strong adhesion, good processability and small shrinkage, it has become one of the most widely used thermosetting resins in the field of prepregs, but epoxy resin without toughening treatment has high crosslinking...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08K9/06C08K9/00C08K7/00C08K7/14C08K3/36C08K3/22C08J5/24C08G59/50
CPCD06M10/08C08K9/04C08L63/00C08J2363/00B32B5/02B32B5/024B32B7/04B32B7/06B32B2250/02B32B2260/021B32B2260/046B32B2264/0264B32B2264/102B32B2307/748B32B29/02B32B2262/101B32B2307/558B32B2307/718B32B2310/14C08J5/244C08J5/249C08J5/248B32B5/22B32B37/1018B32B2255/02B32B2255/26B32B2309/68C08J5/043
Inventor 包海峰崔小强
Owner CHANGZHOU LOONG TOP NEW MATERIALS TECH
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