English Abstract

Studies on Phase Morphology and Properties of NR/ENR Blends Katsushi Nishi Industrial Technology Center of Okayama Prefecture, Okayama, Japan Kazuya Nagata Industrial Technology Center of Okayama Prefecture, Okayama, Japan Soji Kodama Okayama Ceramics Research Foundation, Okayama, Japan Eisuke Yamada Aichi Institute of Technology, Aichi, Japan Nippon Gomu Kyokaishi,(2004),77(1), 3-8 Original Paper in Japanese. Abstract The influence of phase morphology of natural rubber (NR) and epoxidized natural rubber (ENR) blends on the properties of the blends was investigated, and the morphology of the blends was analyzed by dynamic mechanical analysis and electron micrographs. The results of dynamic mechanical analysis and electron micrographs indicate that NR/ENR blends in various compositions have multiphase structures, and that conversion of the co-continuous phase occurs at volume fraction of ENR near 0.35. Gas permeability and oil resistance of the blends were influenced strongly by the phase structure, and mechanical properties of the blends also corresponded to the phase conversion. Keywords: NR/ENR blendsCDynamic mechanical analysis, Morphology, Electron micrographs, Multiphase structure

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