The  linear low density polyolefins by the copolymerization of ethylene with α-olefin has the advantages of low density, crystallinity and rigidity compared with ordinary polyolefin. But  it can hardly formed using  rare earth metal catalyst.  Therefore, we try to explore the catalytic system for efficient copolymerization of ethylene with α-olefins. Then we found the fluorenyl functional carbene scandium complexes  catalyzing  this process efficiently.

 The  linear low density polyolefins by the copolymerization of ethylene with α-olefin has the advantages of low density, crystallinity and rigidity compared with ordinary polyolefin. But  it can hardly formed using  rare earth metal catalyst.  Therefore, we try to explore the catalytic system for efficient copolymerization of ethylene with α-olefins. Then we found the fluorenyl functional carbene scandium complexes  catalyzing  this process efficiently.

中国科学院长春应用化学研究所崔冬梅课题组刘博博士和李世辉副研究员使用脒基稀土催化剂首次实现了生物质单体β-月桂烯高全同立构、间同立构以及无规立构3,4-选择性聚合，并开发出了一系列新型生物基弹性体3,4-聚β-月桂烯（Chem. Commun., 2015, 51, 1039；Chinese Journal of Polymer Science 2015, 5, 792）。以β-月桂烯为原料制成的3-亚甲基环戊烯作为单体，利用自主研发的稀土催化体系，在常规聚合条件下，以极高的聚合活性制备出了高分子量、高1,4-立构规整的1,4-聚3-亚甲基环戊烯,该部分实验结果以通讯的形式发表在德国应用化学(Coordination Polymerization of Renewable3-Methylenecyclopentene with Rare-Earth-Metal Precursors, Bo Liu, Shihui Li, Meiyan Wang and Dongmei Cui, Angew. Chem. Int. Ed. 2017, 56, 4560).

Artical Link：

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

[2]http://onlinelibrary.wiley.com/doi/10.1002/anie.201700546/full