Comparative studies of photocrosslinking of a butadiene-styrene copolymer without and with a magnetic field |
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| Institution: | 1. Institute of Chemistry, College of Science, Pontificia Universidad Católica de Valparaiso, Av. Universidad 330, Placilla (Curauma), Valparaiso, Chile.;2. School of Design, Universidad Adolfo Ibáñez, Diagonal Las Torres 2640, Santiago, Chile;1. Department of Engineering Science, University West, Trollhättan, Sweden;2. ENSIL, Limoges, France;3. Treibacher Industrie AG, Althofen, Austria;4. Swerea IVF AB, Mölndal, Sweden;1. Faculty of Mechanical Engineering, Brno University of Technology, Technická 2, 616 69 Brno, Czech Republic;2. Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic;3. Faculty of Special Technology, Alexander Dubcek University of Trencin, Pri parku 19, 911 06 Trencin, Slovak Republic |
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| Abstract: | A butadiene-styrene copolymer with 10 wt% styrene and containing an aromatic ketone (benzophenone or deoxybenzoin) was crosslinked by u.v. irradiation. The reactions were investigated in comparative experiments both without and with a magnetic field (flux density B = 1.0 Tesla). The degree of crosslinking was measured by a sol/gel analysis (determination of the polymer fraction soluble in ethyl acetate). About i5% less of the polymer was soluble after reaction in the magnetic field, corresponding to a higher crosslink yield. The results are confirmed by statistical evaluation and discussed with respect to the possible reasons for the influence of the magnetic field on the reactions and the different crosslinking efficiencies of the ketones. |
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