Premium
Amphiphilic block copolymers using miscellaneous ω‐functional poly(ethylene oxide)'s as transfer agent
Author(s) -
Businelli Laurent,
Deleuze H.,
Gnanou Yves,
Maillard Bernard
Publication year - 2000
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 - 10.1002/1521-3935(20000901)201:14<1833::aid-macp1833>3.0.co;2-7
Subject(s) - copolymer , polymer chemistry , chain transfer , transfer agent , ethylene oxide , amphiphile , catalytic chain transfer , chemistry , radical polymerization , acrylate , polymer , vinyl acetate , polymerization , molar mass , styrene , ethyl acrylate , organic chemistry
Free radical polymerizations of styrene, ethyl methacrylate, butyl acrylate and vinyl acetate were carried out in the presence of unsaturated peroxyketals, dithiobisthiocarbonates and thiols used as transfer agents. The latter functions were then introduced at the end of poly(ethylene oxide) (PEO) chains and the oligomeric transfer agents obtained subsequently served to prepare amphiphilic block polymers by free radical polymerization. The chain transfer coefficient of these transfer agents with respect to growing polystyryl radicals were found to decrease with their chain length. PEO transfer agents exhibiting only low molar masses appeared to be of practical use.