エポキシ接着剤を用いた炭素繊維強化プラスチックスと異種材料の接着特性における硬化剤の影響

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  • Effect of Curing Agent on Adhesive Properties between Carbon Fiber Reinforced Plastics and Different Materials by using Epoxy Adhesive

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<p>Accurate measurements for mechanical properties of unidirectional carbon fiber reinforced plastics (CFRP) are difficult, because many destruction of unidirectional CFRP specimen occurs at the edge or inside of tab parts. Bonding properties between CFRP and tabs was focused, effect of adhesion on hardener for epoxy resin and materials of tabs was investigated. Denature polyamine and polymercaptan were used as hardener for epoxy resin. And, glass fiber reinforced plastics (GFRP), aluminum, poly(methyl methacrylate) (PMMA) and stainless steel (SUS) were bonded as materials of tabs. Adhesive strength as bonding properties was measured in tensile lap-shear strength test for adhesive joint specimens using those hardener and base materials. As results, it was shown that adhesive strength at specimen used denature polyamine was higher than that used polymercaptan. The results of observation on failure surface were suggested that different of those adhesive strengths depends on interfacial strength between adhesive and base material. On the other hands, the comparison of base materials was shown that adhesive strength of CFRP/PMMA specimen was the lowest 3.59 MPa and adhesive strength of CFRP/SUS specimen was the highest 17.1 MPa. The results of observation on failure surface were suggested that adhesive strengths depend on interfacial strength between adhesive and base material. However, for adhesive stress over than 13 MPa, adhesive strength might depend on interfacial strength between carbon fiber and matrix inside CFRP base materials.</p>

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