Lewis acid/base modulation in β-diiminate zinc-catalyzed switchable ring-opening polymerization of rac-lactide

被引：12
|
作者：
Zhang, Pan [1 ]
Zhao, Minhui [1 ]
Pang, Wenmin [1 ]
Chen, Changle [1 ]
机构：
[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Dept Polymer Sci & Engn, Chinese Acad Sci,Key Lab Soft Matter Chem, Hefei 230026, Anhui, Peoples R China
来源：
SCIENCE CHINA-CHEMISTRY | 2019年 / 62卷 / 04期
基金：
中国国家自然科学基金;
关键词：
ring-opening polymerization; beta-diimine; zinc catalysts; modulation; REDOX-CONTROLLED POLYMERIZATION; OLEFIN POLYMERIZATION; COORDINATION POLYMERIZATION; ETHYLENE POLYMERIZATION; PALLADIUM; COPOLYMERIZATION; ACID;
D O I：
10.1007/s11426-018-9414-3
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Two beta-diiminate zinc complexes were prepared and found to show high activity and well-controlled catalytic behavior in the ring-opening polymerization of rac-lactide. Coordination of the Lewis acid to the zinc complexes completely terminated the polymerization. The coordinated Lewis acid was easily cleaved by using a Lewis base, so that the polymerization could resume. Thus, switchable polymerization could be realized by the subsequent addition of a Lewis acid and a Lewis base. This work provides a new strategy to control the ring-opening polymerization of rac-lactide.
引用
收藏
页码：475 / 478
页数：4
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