Publication: Vulcanization: New focus on a traditional technology by small-angle neutron scattering
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2009-04-14
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00249297
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2-s2.0-66649108042
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Mahidol University
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Macromolecules. Vol.42, No.7 (2009), 2741-2748
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Yuko Ikeda, Norihito Higashitani, Kensuke Hijikata, Yota Kokubo, Yuichi Morita, Mitsuhiro Shibayama, Noboru Osaka, Takuya Suzuki, Hitoshi Endo, Shinzo Kohjiya (2009). Vulcanization: New focus on a traditional technology by small-angle neutron scattering. Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/27429.
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Vulcanization: New focus on a traditional technology by small-angle neutron scattering
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Abstract
Vulcanization is the most important and conventional process in preparing rubber products. Network structure in the vulcanizates has been assumed to dominantly determine their physical properties together with network-chain density. Therefore, control of network structure in the vulcanizates is of at most importance for a fundamental design of rubber products. However, inhomogeneity of the network structure has not been much elucidated in spite of the long history of vulcanization since 1839, due to the complicated reactions among rubber and cross-linking reagents. Here, we look more closely at vulcanization and show its new role to control the network inhomogeneity on the basis of small-angle neutron scattering analysis of vulcanized rubbers. Combination and composition of the cross-linking reagents, especially those of zinc oxide with the other reagents, were found to be crucial for the control. A characteristic feature of strain-induced crystallization of the vulcanizates is also accounted for by the notion of network inhomogeneity. These results will be useful for further enhancing the technological potential of the traditional yet indispensable vulcanization. © 2009 American Chemical Society.