集成橡胶结构组成对其白炭黑补强胶料性能的影响

Influence of Chemical Composition of Integrated Rubber on Properties of Its Compound Reinforced by Silica

研究集成橡胶(SIBR)的结构组成对其白炭黑补强胶料性能的影响。结果表明:SIBR的1,4-结构[1,4-丁二烯(Bd)和1,4-异戊二烯(Ip)]含量大、非1,4-结构(苯乙烯、1,2-Bd和3,4-Ip)含量小,生胶的玻璃化温度低,胶料的硫化速率快,白炭黑分散性好,硫化胶的撕裂强度高,0和60℃时的损耗因子小,抗湿滑性能差,滚动阻力低;SIBR相对分子质量大,硫化胶的拉伸强度高、耐磨性能好;SIBR分子链自由末端含量小和分子链偶联效应强,硫化胶的滚动阻力低;SIBR中Ip含量越大,分子链间的摩擦和内耗小,硫化胶的压缩疲劳温升低。

The influence of the chemical composition of integrated rubber（SIBR） on the properties of its compound reinforced by silica was studied. The results showed that,when the content of 1,4-structure（1,4-butadiene and 1,4-isoprene） in SIBR was higher,and the content of non-1,4-structure（styrene,1,2-butadiene and 3,4-isoprene） was lower,the glass transition temperature of the raw rubber was lower,the curing rate of the compound was faster,the dispersion of silica was better,the tear strength of the vulcanizate was higher,the loss factor at 0 ℃ and 60 ℃ were smaller,the wet skid resistance was poorer,and the rolling resistance was lower. When the molecular weight of SIBR was larger,the tensile strength of the vulcanizate was higher,and wear resistance was better. When the content of the free chain end of SIBR was lower and the coupling effect of molecular chain was stronger,the rolling resistance of the vulcanizate was lower. When the content of isoprene in SIBR was larger,the internal friction and hysteresis between the molecular chains were lower,and the compression fatigue temperature rise of the vulcanizate was lower.