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.
中國(guó)科學(xué)院長(zhǎng)春應(yīng)用化學(xué)研究所崔冬梅課題組劉博博士和李世輝副研究員使用脒基稀土催化劑首次實(shí)現(xiàn)了生物質(zhì)單體β-月桂烯高全同立構(gòu)、間同立構(gòu)以及無(wú)規(guī)立構(gòu)3,4-選擇性聚合，并開發(fā)出了一系列新型生物基彈性體3,4-聚β-月桂烯（Chem. Commun., 2015, 51, 1039；Chinese Journal of Polymer Science 2015, 5, 792）。以β-月桂烯為原料制成的3-亞甲基環(huán)戊烯作為單體，利用自主研發(fā)的稀土催化體系，在常規(guī)聚合條件下，以極高的聚合活性制備出了高分子量、高1,4-立構(gòu)規(guī)整的1,4-聚3-亞甲基環(huán)戊烯,該部分實(shí)驗(yàn)結(jié)果以通訊的形式發(fā)表在德國(guó)應(yīng)用化學(xué)(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