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New peracid‐type polymeric initiator for radical polymerization
Author(s) -
Hsiue GingHo,
Perng TirngLair,
Yang JenMing
Publication year - 1991
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.1991.070420712
Subject(s) - polymerization , copolymer , polymer chemistry , radical polymerization , acrylic acid , polymer , chemistry , activation energy , methacrylate , radical initiator , styrene , methyl methacrylate , materials science , reactivity (psychology) , organic chemistry , medicine , alternative medicine , pathology
In this study, a radiation‐induced copolymer, namely polyethylene‐ g ‐acrylic acid powder, was used, whose carboxyl groups can be oxidized to form a highly reactive polymer initiator. The activation energy for its decomposition is 22.4 kcal/mol. It was found that the peracid‐type polymeric powder was effective as an initiator for radical polymerization. It had high reactivity toward 2‐hydroxyethyl methacrylate (HEMA), which could be easily grafted onto the polymeric powder; also, the homopolymer could be obtained. The kinetic investigation indicated that this polymerization proceeded by a radial mechanism, and the overall activation energy of homopolymerization was 18.67 kcal/mol and the overall activation energy of bigraft polymerization was 17.35 kcal/mol. By using the peracid‐type polymeric powder as initiator for the copolymerization of methyl methacrylate with styrene, it was confirmed that the polymerization initiated by the peracid‐type polymeric powder was a radical reaction.