Radiation-induced polymerization of 3-octylthiophene |
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| Authors: | Akihiro Ishigaki Hitoshi Koizumi |
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| Affiliation: | 1. QOPNA, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal;2. CICECO, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal;1. Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721102, West Bengal, India;2. Department of Physics, Midnapore College, Midnapore 721101, West Bengal, India;3. Department of Chemistry, Durham University, Durham DH1 3LE, UK;4. Dipartimento di Scienze Chimiche e Farmaceutiche, University of Trieste, 34127 Trieste, Italy;1. Department of Chemistry, Middle East Technical University, Ankara 06800, Turkey;2. Department of Biotechnology, Middle East Technical University, Ankara 06800, Turkey;3. Institute of Science and Technology, Department of Advanced Technologies, Gazi University, Ankara 06570, Turkey;4. Department of Chemistry, Faculty of Science, Dokuz Eylul University, Izmir 35160, Turkey;5. Department of Polymer Science and Technology, Middle East Technical University, Ankara 06800, Turkey;6. The Center for Solar Energy Research and Application (GUNAM), Middle East Technical University, Ankara 06800, Turkey;1. Department of Mechatronics Engineering, H.F.T. Technology Faculty, Celal Bayar University, Turgutlu, Manisa, Turkey;2. Department of Physics, Celal Bayar University, Manisa, Turkey;3. Department of Chemistry, Celal Bayar University, Manisa, Turkey |
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| Abstract: | In order to develop a new synthetic method and to study mechanism of oxidative polymerization of conducting polymers, polymerization of 3-octylthiophene in several organic solvents by γ-irradiation was examined. Polymers bimodal distribution with molecular weights at 500–1000 and 2000–3000 were generated by the irradiation of chloroform solutions. The values of monomer conversion (G(?M)) decreased from 445 to 10 with doses from 0.99 kGy to 594 kGy. The large G(?M) values and dose dependence of G(?M) cannot be explained with widely accepted mechanism for electrochemical polymerization or chemical oxidative polymerization. Another mechanism, which proceeds through chain reactions, is proposed. This mechanism explains the large G(?M) and the dependence on the dose. |
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