Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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Fracture Toughness of the Thermoplastic Vulcanizates from EPDM/PP/Ionomer Ternary Blends

EPDM/PP/Ionomer 삼원 블렌드로 된 열가소성 가황체의 파괴 인성

  • Kim, K. (Dept. of Polymer Science and Engineer, Pusan National University) ;
  • Cho, W.J. (Dept. of Polymer Science and Engineer, Pusan National University) ;
  • Ha, C.S. (Dept. of Polymer Science and Engineer, Pusan National University) ;
  • Go, J.H. (Research Center, Kumho Co., LTD.)
  • 김영규 (부산대학교 고분자공학과) ;
  • 조원제 (부산대학교 고분자공학과) ;
  • 하창식 (부산대학교 고분자공학과) ;
  • 고진환 ((주)금호타이어 연구소)
  • Published : 1996.12.31
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Abstract

The fracture mechanics investigation of the thermoplastic vulcanizates(TPV) from EPDM and PP/Ionomer ternary blends was performed in terms of the J-integral by measuring fracture energy via the locus method. The TPV from ternary blends consisting of EPDM, PP and ionomer were prepared in a laboratory integral mixer by blending and vulcanizing simultaneously. Vulcanization was performed with dicumyl peroxide (DCP) and the composition of EPDM and PP was fixed at 50/50 by weight. Two kinds of poly(ethylene-co-methacrylic acid) (EMA) lonomers were used. The J-integral values at crack initiation, Jc, of the dynamically vulcanized EPDM and PP/EMA Ionomer ternary blends were affected by the cation types $(Na^+\;or\;Zn^{2+})$ and contents(5-20wt%) of the added EMA Ionomers. The ternary blend containing 20wt% zinc-neutralized EMA Ionomer and 1.0phr DCP showed the highest Jc values of the blends.

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