Crosslink network evolution of BIIR/EPDM blends during peroxide vulcanization |
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| Institution: | 1. School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 200240, China;2. ARLANXEO Canada Inc., London, N6G 0J3, Canada;1. Department of Polymer Science & Engineering, Hannam University, Daejeon 34054, Republic of Korea;2. Underground Solutions Inc., Poway, CA 92064, USA;3. Ansco Inc., Daejeon 34051, Republic of Korea;1. Department of Electrical, Electronic, and Information Engineering “Guglielmo Marconi”, University of Bologna, Viale Risorgimento 2, Bologna, 40136, Italy;2. Department of Civil, Chemical, Environmental, and Materials Engineering, University of Bologna, Via Terracini 28, Bologna, 40131, Italy;3. Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, Bologna, 40136, Italy;1. College of Mechanical Engineering, Anhui University of Science and Technology, Huainan 232001, China;2. Institute of Plastic Machinery and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;3. Interdisciplinary Research Center (IRC) in Polymer Engineering, School of Engineering, Design, and Technology, University of Bradford, Bradford BD7 1DP, West Yorkshire, United Kingdom;1. The University of Tulsa, Mechanical Engineering, Tulsa, USA;2. University of Oklahoma Health Sciences Center, Oklahoma City, USA;1. Toray Research Center, Inc., Otsu, 520-8567, Japan;2. Application R&D Center, Horiba Ltd., Kyoto, 601-8510, Japan;3. Rakuyo Giken Co., Ltd., Kumiyama-cho, Kyoto, 613-0023, Japan;4. Graduate School of Science, Hiroshima University, Higashihiroshima, 739-8526, Japan |
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| Abstract: | Crosslink network evolution of brominated butyl rubber (BIIR)/ethylene–propylene–diene-monomer rubber (EPDM) blends during peroxide vulcanization is studied at a meso-scale level. In this work, EPDM is added as a co-agent to increase the crosslink density of BIIR vulcanization. With increasing EPDM content from 0 to 20 phr, the maximum torque of BIIR/EPDM compounds during vulcanization increases by 73%, reaching to 3.40 dNm. Vulcanization kinetic study shows that addition of EPDM favors to the crosslinking of BIIR compound. Meanwhile, the addition of 20 phr EPDM contributes to an increase in the crosslink density of BIIR/EPDM(80/20) vulcanizate, avoiding downward trend at post-cure period in comparison with BIIR only. Crosslink network evolution of BIIR/EPDM blends is divided into three periods during peroxide vulcanization at 150 °C. The role of EPDM in the crosslink network evolution is studied by proton nuclear magnetic resonance, and a “network patching” mechanism is proposed in which EPDM is implied to work as patch on damaged crosslink network resulted from the degradation nature of BIIR. |
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| Keywords: | Blends Peroxide vulcanization Crosslink network evolution |
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