Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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Morphology of EPDM-based Thermoplastic Vulcanizates

EPDM계 열가소성 가황체의 형태학적 연구

  • Lee, Sang-Jin (Research Institute of Industrial Technology, Pusan National University) ;
  • Kim, Young-Kyoo (Institute for Advanced Engineering) ;
  • Park, Seong-Soo (Research Institute of Industrial Technology, Pusan National University) ;
  • Cho, Won-Jei (Dept. of Polymer Science and Engineering, Pusan National University) ;
  • Ha, Chang-Sik (Dept. of Polymer Science and Engineering, Pusan National University)
  • 이상진 (부산대학교 생산기술연구소) ;
  • 김영규 (고등기술연구원) ;
  • 박성수 (부산대학교 생산기술연구소) ;
  • 조원제 (부산대학교 고분자공학과) ;
  • 하창식 (부산대학교 고분자공학과)
  • Published : 1997.08.31
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Abstract

The morphology of the thermoplastic vulcanizates prepared from ethylene-propylene-diene terpolymer, polypropylene and high density polyethylene(HDPE) or ethylene based ionomer were studied. Blends were prepared in a laboratory internal mixer where EPDM was cured in the presence of PP and HDPE or ionomer under shear with dicumyl peroxide(DCP). The effects of DCP concentration and rubber/plastics composition were studied. In the morphological analysis by scanning electron microscopy (SEM), a small amount of EPDM acted as a compatibilizer to HDPE and PP. It was also revealed that the dynamic vulcanization process could reduce the domain size of the crosslinked EPDM phase. When ionomer was added to EPDM/PP blend, the thermoplastic vulcanizate showed typical ductile fracture topology and the trend was more clearly observed when DCP contents and ionomer contents are higher.

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