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Depolymerization of poly(fluoroalkyl methacrylate‐co‐methyl methacrylate) as studied with thermogravimetry
Author(s) -
Hayakawa Kiyoshi,
Kawase Kaoru,
Yamakita Hiromi,
Taoda Hiroshi
Publication year - 1986
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.1986.070320216
Subject(s) - depolymerization , methyl methacrylate , methacrylate , copolymer , polymer chemistry , thermogravimetric analysis , thermogravimetry , materials science , thermal stability , polymer , chemistry , organic chemistry , composite material , inorganic chemistry
Thermal behaviors of a few kinds of poly(fluoroalkyl methacrylate‐co‐methyl methacrylate) prepared by γ‐ray copolymerization were investigated by using thermogravimetric measurements together with the intermittent analysis of the gaseous products. The thermal degradation of copolymers composed of one of fluoroalkyl methacrylates of the following structures: CH 2 C(CH 3 )COOCH 2 (CF 2 CF 2 ) n H, where n = 1,2, and 3, and methyl methacrylate proceeded according to the depolymerization mechanism reproducing the pristine component comonomers exclusively, but their thermograms in inert atmosphere showed the feature of a two‐step reaction. In air, however, thermograms of copolymers did not show such a stepwise decrease in weight with the elevating temperature, and temperatures at which depolymerization was introduced shifted to a much higher region. The overall aspects of depolymerization of copolymers seemed to be much similar to that of fluoroalkyl methacrylate homopolymer previously reported, and the retardation of depolymerization by air was considered to be due mainly to the stabilization of once‐formed polymer radicals by oxygen.