The involvement of 2-vinylthiophene and 2-styrylthiophene in the radical polymerization of methyl methacrylate |
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| Institution: | 1. Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan;2. Faculty of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan;1. Sulaiman Bin Abdullah Aba Al-Khail-Centre for Interdisciplinary Research in Basic Sciences (SA-CIRBS), International Islamic University 44000 Islamabad, Pakistan;2. School of Chemistry and Manchester Institute of Biotechnology, The University of Manchester, 131 Princess Street, Manchester M1 7DN, United Kingdom;3. Department of Chemistry, Quaid-i-Azam University 45320 Islamabad, Pakistan;4. Department of Biological Sciences, College of Natural Science, Kongju National University, Gongju 32588, Republic of Korea;5. Department of Physiology, University of Sindh, Jamshoro, Pakistan;1. State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China;2. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China |
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| Abstract: | The reactivity of 2-vinylthiophene (2VT) towards the 2-cyano-2-propyl radical and that of 2-styrylthiophene (2ST) towards the benzoyloxy radical have been assessed by methods depending upon examination by NMR of 13C-enriched end-groups in polymers and copolymers. At 60°C, 2VT is about 5 times as reactive as methyl methacrylate (MMA) towards (CH3)2C(CN); 2ST is nearly 300 times as reactive as MMA towards C6H5·CO·O. When MMA is polymerized with benzoyl peroxide in the presence of 2ST at quite low concentration, very little 2ST is incorporated within the polymer chains but many of the end-groups consist of benzoate groups attached to 2ST units. |
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