星型中乙烯基聚丁二烯橡胶结构与性能研究

STUDY ON THE INFLUENCE OF MICROSTRUCTURE OF STAR MEDIUM VINYL BUTADIENE RUBBER TO ITS PROPERTIES

研究了用自行发明的多官能团有机锂引发体系一步法合成的星型中乙烯基聚丁二烯橡胶( MVBR)的分子量、乙烯基含量、偶联臂数对其加工流变性能、静态、动态力学性能的影响。结果表明 ,单臂分子量为 8万、乙烯基含量为 4 9.7%、平均偶联臂数为 3.8时 ,胶料的加工流变性能优异、力学强度高、动态生热低。与线型 MVBR和 BR相比 ,星型 MVBR的抗湿滑性好、滚动阻力低。星型

The influence of molecular weight, vinyl content, number of arm of star MVBR coupled with SnCl 4 to its processing, flow, physical mechanical and dynamic properties has been studied. Star MVBR was prepared by anionic polymerization process with new invented multi functional group organic lithium initiator by our college. The results show that star MVBR, whose molecular weight of one arm attaints to 80000 , vinyl content is about 49.7% and average number of arm coupled with SnCl 4 is 3.8 , has good processing and flow property, high physical mechanical properties and low heat accumulation. Compared with linear MVBR and cis BR, star MVRB has low rolling energy loss and good wet grit and is an excellent tire tread material.