Radical polymerization of (trimethylsilylethynyl)styrene and thermal properties of polystyrene with ethynyl group |
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| Authors: | Katsuyuki Tsuda Wataru Hirahata Kazuaki Yokota Toyoji Kakuchi Takashi Ishizone Akira Hirao |
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| Affiliation: | (1) Department of Industrial Chemistry, Asahikawa National College of Technology, Shunkodai 2-2, Asahikawa 071, Japan, JP;(2) Graduate School of Engineering and Graduate School of Environmental Earth Science, Hokkaido University, Sapporo 060, Japan, JP;(3) Department of Polymer Chemistry, Faculty of Engineering, Tokyo Institute of Technology, 2-12-1, Ohokayama, Meguro-ku, Tokyo 152, Japan, JP |
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| Abstract: | The radical polymerizations of 2-, 3-, and 4-(trimethylsilylethynyl)styrenes (1 a – c) and copolymerizations of 1 a – c (M1) with styrene (M2) have been studied. Copolymerization parameters were determined as r1 = 1.22 and r2 = 0.54 for 1 a, 1 = 1.10 and r2 = 0.90 for 1 b, and r1 = 1.42 and r2 = 0.38 for 1 c. The deprotection of the trimethylsilyl groups in poly(trimethylsilylethynyl)styrene] (2 a – c) and poly(trimethylsilylethynyl)styrene-co-styrene] (4 a – c) using (C4H9)4NF smoothly proceeded to yield poly(ethynylstyrene) (3 a – c) and poly(ethynylstyrene-co-styrene) (5 a – c), respectively, which underwent curing reactions at elevated temperature to form crosslinking polystyrenes.
Received: 31 March 1997/Revised: 2 June 1997/Accepted: 3 June 1997 |
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