Copolymerization of ethylene with 1,1-disubstituted olefins catalyzed by ansa-(fluorenyl)(cyclododecylamido)dimethyltitanium complexes

被引：23
|
作者：
Nakayama, Yuushou [1 ]
Sogo, Yuuichi [1 ]
Cai, Zhengguo [1 ]
Shiono, Takeshi [1 ]
机构：
[1] Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Higashihiroshima 7398527, Japan
来源：
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2013年 / 51卷 / 05期
基金：
日本科学技术振兴机构;
关键词：
alternating copolymerization; ethylene; isobutylene; limonene; metallocene catalysts; modified methylaluminoxane; ANSA-FLUORENYLAMIDODIMETHYLTITANIUM COMPLEX; SYNDIOSPECIFIC LIVING POLYMERIZATION; FLUORENYL LIGAND; HIGHER; 1-ALKENE; VINYL ADDITION; NORBORNENE; PROPYLENE; PROPENE; ETHENE;
D O I：
10.1002/pola.26491
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A series of titanium complexes with ansa-(fluorenyl)(cyclododecylamido) ligands, Me2Si(?3-R)(N-c-C12H23)TiMe2 [R = fluorenyl (5), 2,7-tBu2fluorenyl (6), 3,6-tBu2fluorenyl (7)], was synthesized. The crystal structure of complex 6 revealed 3-coordination of the fluorenyl moiety to the metal. Upon activation with trialkylaluminum-free modified methylaluminoxane, complexes 57 as well as the corresponding tBu amide complexes, Me2Si(?3-R)(NtBu)TiMe2 [R = fluorenyl (2), 2,7-tBu2fluorenyl (3), 3,6-tBu2fluorenyl (4)], were adopted as the catalysts for the copolymerization of ethylene (E) and isobutylene (IB). Among these complexes, complex 6 was found to achieve the highest IB incorporation to produce alternating E-IB copolymers. Complex 6 system also achieved copolymerization of E and limonene. (c) 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2013
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收藏
页码：1223 / 1229
页数：7
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