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.
QuelleSource
- Pure and Applied Chemistry
- 58
- De Gruyter | 1986