織維強化ポリプロピレンの接着接合部の破壊強度に及ぼす大気圧低温プラズマ処理の影響

抄録

Fiber reinforced polypropylene(FRPP) has advantages of low cost and light weight. However, because of its low surface energy, bonding strength of FRPP is generally very low. Surface treatment before bonding is one of the candidates to solve this problem. In this study, the adherend was subjected to plasma treatment to improve the bonding strength of FRPP. As the condition of surface treatment, preheating condition and nitrogen atmosphere condition were discussed. Lap shear test was conducted to find appropriate method for the plasma treatment of FRPP and the fracture strength of adhesively bonded joints has been investigated. Tensile rate was set to 10mm/s. Experimental results showed that the fracture strength improved by 1.3 times under preheating condition. Also, the fracture strength improved by 1.2 times under nitrogen atmosphere condition. It was found that it is possible to improve the effect of plasma treatment by changing the state of the test specimen during the surface treatment. Additionally, it was found that the rate of material failure of the bonding area increased by introduction of preheating condition and nitrogen atmospher condition.