文献类型：期刊文献

中文题名：CpTiCl_2(OR)/MAO体系催化苯乙烯间规聚合的研究

英文题名：Studies on Syndiospecific Polymerization of Styrene Catalyzed by CpTiCl_2(OR)/MAO System

作者：马海燕[1];张越[1];陈斌[1];黄吉玲[1];钱延龙[1]

机构：[1]华东理工大学金属有机化学研究室,上海200237

年份：2001

卷号：22

期号：7

起止页码：1259

中文期刊名：高等学校化学学报

外文期刊名：Chemical Journal of Chinese Universities

收录：CSTPCD;;Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金 (批准号 :2 98710 10 );国家自然科学基金与中国石化总公司联合基金 (批准号 :2 973414 5 )

语种：中文

中文关键词：茂金属催化剂;聚苯乙烯;钛有机化合物;甲基铝氧烷;间规聚合;苯乙烯

外文关键词：Metallocene catalyst; Styrene; Syndiospecific polymerization; Titanium

摘要：Five new alkoxyl substituted half sandwich complexes CpTiCl 2(OR), R=methoxylethyl(1), methoxylpropyl(2), methoxylisopropyl(3), o methoxylphenyl(4), tetrahydrofurfuryl(5), were synthesized, characterized and tested as catalyst precursors for the syndiospecific polymerization of styrene. When activated with methylaluminoxane(MAO), the new precursors 1-5 exhibited high catalytic activity for the syndiospecific polymerization of styrene and were more active than CpTiCl 3. The different structures of alkoxyl ligands affected the activity slightly. When the polymerization was carried in bulk, all the five precursors exhibited high catalytic activity even at low ratio of c (Al)/ c (Ti)=300, the s PS% of the polymer produced by alkoxyl substituted complexes was much higher than that of CpTiCl 3. The polymerization temperature of 70 ℃ was more suitable for this kind of complexes. The existence of the additional oxygen atom in the alkoxyl ligands stabilized the active species at the higher temperature.
Five new alkoxyl substituted half sandwich complexes CpTiCl 2(OR), R=methoxylethyl(1), methoxylpropyl(2), methoxylisopropyl(3), o methoxylphenyl(4), tetrahydrofurfuryl(5), were synthesized, characterized and tested as catalyst precursors for the syndiospecific polymerization of styrene. When activated with methylaluminoxane(MAO), the new precursors 1-5 exhibited high catalytic activity for the syndiospecific polymerization of styrene and were more active than CpTiCl 3. The different structures of alkoxyl ligands affected the activity slightly. When the polymerization was carried in bulk, all the five precursors exhibited high catalytic activity even at low ratio of c (Al)/ c (Ti)=300, the s PS% of the polymer produced by alkoxyl substituted complexes was much higher than that of CpTiCl 3. The polymerization temperature of 70 ℃ was more suitable for this kind of complexes. The existence of the additional oxygen atom in the alkoxyl ligands stabilized the active species at the higher temperature.