文献类型：期刊文献

中文题名：亚乙基桥联-(4-取代茚)(芴)锆金属络合物的合成及其催化α-烯烃聚合反应

英文题名：Ethylene-bridged (4-Substituted Indenyl) (Fluorenyl) Zirconium Complexes:Synthesis and Catalytic Behavior for α-Olefins Polymerization

作者：黄文忠[1];马海燕[1];黄吉玲[1]

机构：[1]华东理工大学金属有机研究室,上海200237

年份：2011

卷号：32

期号：4

起止页码：657

中文期刊名：催化学报

外文期刊名：CHINESE JOURNAL OF CATALYSIS

收录：CSTPCD;;Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000290074100022)】；北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：This work was supported by the National Basic Research Program of China (973 Program, 2005CB623801), the National Natural Science Foundation of China (20774027), and the Key Project of Chinese Ministry of Education (109064).

语种：中文

中文关键词：桥联茂金属络合物;锆;聚合;等规聚丙烯;聚乙烯

外文关键词：ansa-metallocene; zirconium; polymerization; isotactic polypropylene; polyethylene

摘要：首次合成了3个C1-对称亚乙基桥联型-(4-取代茚)(芴)锆络合物2a～2c.并以甲基铝氧烷(MAO)为助催化剂用于催化丙烯聚合反应,所得聚丙烯具有较高的等规立构规整度,且随聚合温度的降低而升高.0oC时茚环2-位有甲基取代的络合物2a表现出最高的等规选择性,为93.6%;而60oC时络合物2a～2c都表现出最高的催化活性,其中络合物2a的为7.80×106gPP/(mol-Zr?h).该类络合物也表现出很高的催化乙烯聚合活性,得到线性宽分布聚乙烯,其中以茚环4-异丙基取代的络合物2c活性最高,在Al/Zr比低至500时仍可达3.45×106gPE/(mol-Zr·h).
Three new ethylene-bridged （4-substituted indenyl） （fluorenyl） zirconium complexes （2a-2c） were successfully synthesized.They exhibited high isotactic selectivity,which increased with the decrease of polymerization temperature for the polymerization of propylene upon the activation of MAO （methylaluminoxane）.Complex 2a with 2-methyl group on indenyl displayed the highest isotactic selectivity of 93.6% at 0 oC.At 60 oC,complexes 2a-2c reached their optimum catalytic activity,and complex 2a displayed the highest activity of 7.80×106 g PP/（mol-Zr？h）.Meanwhile,complexes 2a-2c were also studied for ethylene homopolymerization and linear polyethylenes with broad molecular weight distributions were obtained.Complex 2c with 4-isopropyl substituent on indenyl showed high activity of 3.45×106 g PE/（mol-Zr·h） even at a low Al/Zr molar ratio of 500.