李天佑,郭敏,史新豪,蔡正国
LI Tian-you,GUO Min,SHI Xin-hao,CAI Zheng-guo

• 1:东华大学材料科学与工程学院
• 2:纤维改性国家重点实验室

摘要(Abstract)：

选用芴环上带有不同取代基配合物1{[t-Bu NHSi Me2Flu]Ti Me2}、2{t-Bu NSi Me2(2,7-di-t-Bu Flu)Ti Me2}、3{[Me2Si(C29H37)(NtBu)]Ti Me2}的Cs-对称芴基氨基二甲基钛络合物,在修饰甲基铝氧烷活化下,进行乙烯常压聚合,研究了取代基对聚合活性和聚乙烯数均相对分子质量的影响。结果表明:随着t-Bu基团的引入,催化剂的聚合活性显著提高,同时聚合物数均相对分子质量明显增加。相当于芴环的2、3、6、7位引入t-Bu基的配合物3的乙烯聚合活性达到2085 kg-PE/(mol-Ti·h),得到数均相对分子质量为81万的聚乙烯。
Fluorenyllamidodimethyltitanium complexes 1{[t-Bu NHSi Me2Flu]Ti Me2}, 2 {t-Bu NSi Me2(2,7-di-t-Bu Flu)Ti Me2} and 3 {[Me2Si(C29H37)(NtBu)]Ti Me2} were applied for ethylene polymerization using modifiedmethyaluminoxane(MMAO/BHT) as a cocatalyst under atmospheric pressure of ethylene respectively. Theintroduction of t-Bu substituents to the fluorenyl ligand improved the polymerization activity and producedhigher molecular weight polyethylene. Complex 3 which contains t-Bu substituents on the 2, 3, 6, 7 positionof fluorenyl ligand showed the highest activity of 2 085 kg-PE/(mol-Ti·h)and number average molecularweight of 810 000.

关键词(KeyWords)： 均相催化剂;芴基氨基二甲基钛配合物;乙烯聚合
single-site catalyst,fluorenyllamidodimethyltitanium complex,ethylene polymerization

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上项目(21174026);; 新世纪优秀人才支持计划资助;; 上海高校特聘教授(东方学者)岗位计划资助;; 上海市教育发展基金会“曙光计划”;; 中央高校基本科研业务费专项资金资助

作者(Author): 李天佑,郭敏,史新豪,蔡正国
LI Tian-you,GUO Min,SHI Xin-hao,CAI Zheng-guo

DOI: 10.16090/j.cnki.hcxw.2015.06.001

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