Copolymerizations of carbon dioxide and epoxides in the presence of rare earth coordinate catalyst

✍ Scribed by Jin-Tang Guo; Xin-Ying Wang; Yong-Shen Xu; Jing-Wu Sun

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 73 KB
• Volume: 87
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.11923

✦ Synopsis

Abstract

Carbon dioxide (CO~2~) as a direct material was copolymerized with epoxides to synthesize new aliphatic polycarbonates, and the copolymerization was catalyzed by the coordinate catalyst composed of rare earth yttrium phosphonate and triisobutylaluminum [Y(P~204~)~3~–A1(i‐Bu)~3~]. The epoxides used in this research included epichlorohydrin (ECH) and some new glycidol ether (GE) monomers prepared by the reaction of ECH and phenol or alcohol, such as α‐allyl glycidol ether, β‐chloroethyl glycidol ether, benzene glycidol ether, m‐tolyl glycidol ether, and benzyl glycidol ether. The copolymers were characterized by infrared (IR), ^1^H nuclear magnetic resonance (‐NMR), and dynamic mechanical analysis. The results show that Y(P~204~)~3~–A1(i‐Bu)~3~ had better catalytic activity in the copolymerization of CO~2~ with epoxide, and the copolymerization rate of aryl GE was distinctly higher than that of aliphatic GE. Dynamic mechanical analysis indicated the glass transition temperature T~g~ of the copolymers GE–CO~2~ were lower than that of ECH–CO~2~. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 87: 2356–2359, 2003