Polymerization Kinetics of Ethylene Oxide Methacrylates in Ionic Media

被引：19
|
作者：
Pedron, Sara [1 ]
Guzman, Julio [1 ]
Garcia, Nuria [1 ]
机构：
[1] CSIC, Inst Ciencia & Tecnol Polimeros, E-28006 Madrid, Spain
来源：
MACROMOLECULAR CHEMISTRY AND PHYSICS | 2011年 / 212卷 / 08期
关键词：
kinetics (polym.); PEGylated methacrylates; propagation rate constant; pulsed-laser polymerization (PLP); radical polymerization; FREE-RADICAL POLYMERIZATION; PROPAGATION RATE COEFFICIENTS; EVALUATED RATE COEFFICIENTS; METHYL-METHACRYLATE; CHAIN PROPAGATION; COPOLYMERS; LIQUIDS; TEMPERATURE; HYDROGELS; VERSATILE;
D O I：
10.1002/macp.201000615
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The radical polymerization of ethylene oxide (PEGylated) methacrylates in ionic media has been studied. Lithium salts interact with the monomer causing a significant increase in the propagation rate constant, k(p), and also providing an ionic and highly viscous medium that sharply decreases the termination rate coefficient, k(t). Both features make the polymerization reactions with lithium salts faster compared to the bulk monomer. The systems are studied by means of FT-IR spectroscopy to identify the interactions between the monomer and the lithium salt. In addition, an extensive kinetic study by PLP-SEC has been performed to study the influence of the lithium salt on k(p) and k(t) in the polymerization of these monomers. These results are compared to those obtained when ionic liquids are used as polymerization medium.
引用
收藏
页码：860 / 869
页数：10
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