エポキシ樹脂の破壊じん性に及ぼすグリシジル系希釈剤の影響

概要

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In order to improve the fracture toughness of an epoxy resin, five kinds of glycidyl compounds were examined as a modifier of the resin. Butyl, phenyl and allyl glycidyl ethers, and glycidyl methacrylate were found to be effective to lower the viscosity of the resin. However, the fracture toughness of the resin was not improved by the 10 phr modification of these monoglycidyl compounds. Polypropylene glycol diglycidyl ether (PPG) was effective both for the reduction of viscosity of the liquid resin and for the promotion of fracture toughness of the cured resin. The fracture toughness of the epoxy resin was doubled by the modification with more than 30wt% of RPG. The heat treatment of the RPG modified resin resulted in the improvement of fracture toughness,at a small sacrifice of the deflection temperature under load. In the case of RPG modification,it was found that the smaller the crosslinking density is,the higher the fracture toughness is.
社団法人日本材料学会の論文
1986-12-15