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Polymerization Kinetics of Ethylene Oxide Methacrylates in Ionic Media
Author(s) -
Pedrón Sara,
Guzmán Julio,
García Nuria
Publication year - 2011
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201000615
Subject(s) - polymerization , monomer , polymer chemistry , ethylene oxide , lithium (medication) , methacrylate , chemistry , ionic bonding , methyl methacrylate , bulk polymerization , radical polymerization , copolymer , polymer , organic chemistry , ion , medicine , endocrinology
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.