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Functionally gradient silicone sheet made by treatment of swelling and polymerization with n ‐butyl methacrylate
Author(s) -
Horiuchi Kenichi,
Suzuki Makoto,
Tanaka Kotaro
Publication year - 2002
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.10177
Subject(s) - monomer , polymer chemistry , polymerization , methacrylate , silicone , materials science , benzoyl peroxide , swelling , composite material , chemistry , polymer
A silicone sheet was dipped into n ‐butyl methacrylate monomer including benzoyl peroxide and was swollen for 0.5 h at 23°C. Then, the sheet was put into a glass tube equipped with a three‐way stopcock and was deoxygenated by freezing under dry nitrogen. Polymerization was carried out by heating at 80°C for 2 h under dry nitrogen. The resultant sheet was a component gradient silicone sheet with poly‐ n ‐butylmethacrylate. The content of poly‐ n ‐butylmethacrylate increased gradually from either surface to the middle of the sheet. This phenomenon was assumed to occur because of the volatilization of n ‐butyl methacrylate monomer during the polymerization. The properties of the sheet include increased tear strength and decreased gas permeability. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 3152–3155, 2002; DOI 10.1002/app.10177