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Preparation method of high-whiteness and high-toughness epoxy resin composite material

A tough epoxy resin and composite material technology, applied in the field of polymer composite materials, can solve the problems of cumbersome process, no mass production, and environmental pollution, and achieve the effect of simple process and no organic solvent

Pending Publication Date: 2021-08-27
QUANZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current block copolymer toughened epoxy resin still has some problems that need to be improved urgently
First, most of the current block copolymers are solid, and generally need to add organic solvents to dissolve and disperse when mixed with epoxy resin, so the process is cumbersome, energy-consuming, low-efficiency, and pollutes the environment
Second, most of the current block copolymers are still synthesized in laboratories and have not been mass-produced, so it is difficult to industrially produce toughened epoxy resins

Method used

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  • Preparation method of high-whiteness and high-toughness epoxy resin composite material
  • Preparation method of high-whiteness and high-toughness epoxy resin composite material

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Effect test

Embodiment 1

[0024] Add 10 parts by mass of epoxy-terminated polyether polysiloxane (polydimethylsiloxane segment: 3000 g / mol, epoxy polyether segment: 500 g / mol) with a molecular weight of 4000 g / mol into 100 After stirring at high speed for 30 minutes in parts by mass of bisphenol A epoxy resin (bisphenol A glycidyl ether), add 25 parts by mass of curing agent polyetheramine D230, and continue stirring at high speed for 10 minutes. Put the mixture into an oven, vacuumize for 10 minutes, remove the air bubbles introduced by stirring, and then pour it into a mold for curing reaction. The curing conditions are: curing for 1 hour at 25° C., and curing at 60° C. for 4 hours to prepare an epoxy resin composite material.

Embodiment 2

[0028] Add 20 mass parts of epoxy-terminated polyether polysiloxane (polydimethylsiloxane segment: 4000g / mol, epoxy polyether segment: 500g / mol) with a molecular weight of 5000g / mol to 100 In the bisphenol A epoxy resin (bisphenol A glycidyl ether) of mass parts, after stirring at high speed for 30 minutes, add the curing agent methyl hexahydrophthalic anhydride of 85 mass parts and 1.5 mass parts of 2,4,6 - Tris(dimethylaminomethyl)phenol, continue stirring at high speed for 10 minutes. Put the mixture into an oven, vacuumize for 10 minutes, remove the air bubbles introduced by stirring, and then pour it into a mold for curing reaction. The curing conditions are: curing at 110° C. for 1.5 hours, then raising the temperature to 160° C. and curing for 4 hours to prepare an epoxy resin composite material.

Embodiment 3

[0032] Add 25 mass parts of epoxy-terminated polyether polysiloxane (polydimethylsiloxane segment: 7700g / mol, epoxy polyether segment: 500g / mol) with a molecular weight of 8700g / mol to 100 In the bisphenol A epoxy resin (bisphenol A glycidyl ether) of mass parts, after stirring at high speed for 30 minutes, add 24.5 mass parts of curing agent diethyltoluenediamine, and continue stirring at high speed for 10 minutes. Put the mixture into an oven, vacuumize for 10 minutes, remove the air bubbles introduced by stirring, and then pour it into a mold for curing reaction. The curing conditions are: curing at 110° C. for 1 hour, then raising the temperature to 180° C. and curing for 2 hours, and an epoxy resin composite material is prepared.

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Abstract

The invention discloses a preparation method of a high-whiteness and high-toughness epoxy resin composite material, and belongs to the field of polymer composite materials. The method comprises the following steps: adding a liquid textile finishing agent-epoxy-terminated polyether polysiloxane as a flexibilizer into an epoxy resin composition, then adding a curing agent, and carrying out a curing reaction to obtain the epoxy resin composite material. According to the preparation method, the size of a nanophase formed in epoxy resin can be controlled by adjusting the lengths of polysiloxane and polyether chain segments in epoxy-terminated polyether polysiloxane, so that the toughening effect of the epoxy resin is regulated and controlled, liquid-liquid blending is performed in the preparation method, the system is obviously whitened and thickened due to the nano phase splitting effect, and thus, the high-whiteness epoxy resin composite material can be prepared. The method disclosed by the invention is simple to operate, green and environment-friendly, and can be used for large-scale production, so that the method has wide application prospects in the fields of building materials, aerospace, electronic packaging and the like.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a preparation method of a high whiteness and toughness epoxy resin composite material. Background technique [0002] Epoxy resin is widely used in electronic packaging, building construction, aerospace and other fields due to its good mechanical strength, adhesiveness, electrical insulation, acid and alkali resistance, and processability. However, due to the high crosslinking density of the three-dimensional epoxy resin structure after curing, the high surface energy of the epoxy resin, and the large internal stress of the curing, the product is brittle and prone to cracks in long-term use. These defects make the epoxy resin Application is limited. Therefore, the toughening modification of epoxy resin has always been an important research topic in the epoxy resin industry. [0003] The commonly used toughening methods for epoxy resins are the introduction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L83/12C08J3/00
CPCC08L63/00C08J3/005C08J2363/00C08J2483/12C08L83/12
Inventor 卓东贤陈少云瞿波高剑虹王睿
Owner QUANZHOU NORMAL UNIV
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