Efficient Synthesis of Hydroxylated Polyethylene via Copolymerization of Ethylene with 5-Norbornene-2-methanol using Bis(β-enaminoketonato)titanium Catalysts
作者:Miao Hong、Yong-Xia Wang、Hong-Liang Mu、Yue-Sheng Li
DOI:10.1021/om200526n
日期:2011.9.12
have been investigated. By optimizing the catalyst structures and polymerization conditions, outstanding catalytic activity and efficient polar comonomer incorporation have been achieved. Catalysts 1b,c and 2b,c with electron-donating groups (Me and tBu) display improved tolerance toward polar group, exhibiting higher catalytic activities. Among these catalysts, 1b produced the copolymer with the highest
使用双(β-烯氨基酮基)钛配合物[RNC(CH 3)CHCO(CF 3)] 2 TiCl 2 [ 1a:R = Ph,1b:R = C 6 H 4 Me(p),1c:R = C 6 H 4 t Bu(p),1d:R = C 6 H 4 F(p),1e:R = C 6 H 4 Me(o)]和[R 2 NC(CF 3)CHCO(R 1)] 2 TiCl 2 [ 2a:R 1 = Ph,R 2 = Ph; 2b:R 1= Ph,R 2= C 6 H 4 Me(p);2c:R 1= Ph,R 2= C 6 H 4 t Bu(p);2d:R 1= Ph,R 2= C 6 H 4 F(p);2e:R 1 = C 6研究了H 4 Me(p),R 2 = Ph]。通过优化催化剂的结构和聚合条件,实现了出色的催化活性和有效的极性共聚单体掺入。具有给电子基团(Me和t Bu)的催化剂1b,c和2b,c显示出对