Influence of Blend Mode of Extender Oil on the Properties of EPDM/PP-Based Thermoplastic Vulcanizates

이피디엠/폴리프로필렌 열가소성 경화물에서 오일의 블렌드 방식이 경화물의 물성에 미치는 영향

  • Na, Sung-Su (Department of Polymer Engineering, Chonnam National University) ;
  • Song, Ki-Chan (Engineering Research Institute, Chonnam National University) ;
  • Kim, Su-Kyung (Department of Polymer Engineering, Chonnam National University)
  • Published : 2009.09.30

Abstract

Influence of blend mode of extender oil on the properties of thermoplastic vulcanizates (TPVs), based on an ethylene-propylene-diene copolymer (EPDM) and a polypropylene (PP), was studied. The EPDM/PP TPVs were prepared in an open roll mill using two different modes in blending sequence of paraffinic oil and phenolic curative, i.e., Oil-Cure and Cure-Oil modes. Degree of cross-linking by gel fraction and properties such as hardness, tensile strength, elongation at break, and melt flow rate were investigated as a function of extender oil content for the two modes. Little influence of the blend mode of extender oil on the degree of cross-linking and mechanical behaviors was observed. However, the use of Cure-Oil mode in the preparation of EPDM/PP TPVs resulted in a marked increase in the level of processability as reflected by melt flow index, as compared to the use of Oil-Cure mode.

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