Premium
Polymerization of methyl methacrylate with H 2 O 2 ‐thiourea redox initiator system
Author(s) -
Ghosh Premamoy,
Banerjee Madhu Sudan
Publication year - 1979
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1979.070230703
Subject(s) - redox , polymerization , chemistry , methyl methacrylate , polymer chemistry , thiourea , aqueous solution , aqueous medium , photochemistry , radical polymerization , reaction mechanism , chain termination , polymer , inorganic chemistry , organic chemistry , catalysis
Polymerization of MMA was done in aqueous media and in a bulk (nonaqueous) system employing a H 2 O 2 ‐TU redox initiator system. Kinetic features differ significantly depending on the nature of the reaction media. The redox system is much more efficient as a chain initiator in aqueous media than in bulk MMA, where conversion to polymer, thermally and even under photoactivated conditions, is very slow and sluggish. In the bulk media, pronounced inhibition and retardation effects appear to be due to formation of unstable reaction intermediate presumably through dimerization of Ṡ(:NH)·NH 2 radical generated in the primary redox reaction.