当前位置:群英聚首 >> 最新动态 >> 正文
课题组吴春姬副研究员、刘波副研究员刘博博士等人的研究成果在Angewande chemie上发表,恭喜!
来源:崔冬梅研究员个人网站 发布日期:2017-06-29

Abstract

Introducing ethylene units into polybutadiene backbones is an approach to synthesize advanced rubber materials, which has been a research challenge because of distinct polymerization mechanisms of the two monomers. To date, onlytrans-1,4- and 1,2-regulated copolymers have been obtained. Herein, we reported the unprecedented cis-1,4 selective copolymerization of ethylene and butadiene by using the thiophene-fused cyclopentadienyl-ligated scandium complexes. The effects of the sterics and electronics of the catalytic precursors as well as the monomer loading mode on the activity and selectivity as well as the sequence lengths were investigated, and the mechanism was elucidated. Thus a novel ethylene-based rubber material possessing a high molecular weight, 80?% cis-1,4 regularity and a Tg=?94?°C without an obvious melting point owing to short polyethylene sequences even at its content up to 45?mol?%, was isolated. This new rubber material exhibited excellent anti-flowing performance and strong tensile strength.


文章链接:

http://onlinelibrary.wiley.com/doi/10.1002/anie.201702128/full


Copyright © 2005 Polymer.cn All rights reserved
中国聚合物网 版权所有
经营性网站备案信息

京公网安备11010502032929号

工商备案公示信息

京ICP证050801号

京ICP备12003651号