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Licensed Unlicensed Requires Authentication Published by De Gruyter 2016 (Print 1986)

Structure and Physical Properties of High-Vinyl Polybutadiene Rubbers and Their Blends

  • A. Yoshioka , K. Komuro , A. Ueda , H. Watanabe , S. Akita , T. Masuda and A. Nakajima

Abstract

Some physical properties of high-vinyl polybutadiene rubber prepared with an alkyl lithium catalyst system were studied in regard to their micro- and macro-molecular structures. It was found that high-vinyl polybutadiene rubbers show characteristic features in the critical properties for tire tread such as rolling resistance and wet skid resistance: (1) High-vinyl polybutadiene rubbers show high rebound resilience at high temperatures despite the high glass transition temperature. (2) High-vinyl polybutadiene rubbers show the highest value of wet skid resistance at approximately 70% vinyl content. (3) The blends of high-vinyl polybutadiene rubbers with high cis-1,4-polybutadiene, and with high cis-1,4-polyisoprene rubber exhibit an excellent balance of rebound resilience and wet skid resistance. The compatibility for these blends series was also discussed. Finally, it is concluded that high-vinyl polybutadiene rubbers with 70% vinyl content, and its blend compounds are suitable tire materials for low fuel consumption, because of the excellent balance of low rolling resistance and high wet grip.

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