Disruption of the multiplets in poly(styrene-co-methacrylate) ionomers by the addition of aliphatic diacid salts |
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Authors: | Jung-Won KimJoon-Seop Kim Soon-Suck Jarng |
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Affiliation: | a Department of Polymer Science and Engineering, Chosun University, Kwangju 501-600, South Korea b Department of Control and Measurement Engineering, Chosun University, Kwangju 501-759, South Korea |
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Abstract: | Dynamic mechanical properties and morphology of poly(styrene-co-sodium methacrylate) ionomers containing disodium salts of aliphatic diacid were investigated. It was found that upon the addition of diacid salts to the ionomers, the position of the matrix loss tangent peak remained constant, but the cluster loss tangent peak shifted to lower temperatures; the size of the matrix loss tangent peak increased, but that of the cluster peak decreased. In addition, the ionomers containing diacid salts showed X-ray diffraction patterns at relatively wide angles but no DSC melting peak. Thus, it was postulated that the organic salts prohibit the ionic groups of the ionomer from forming multiplets, and that the ionic groups of the ionomer, not forming the multiplets, participate in the formation of ionic aggregates with the ionic groups of the diacid salts. |
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Keywords: | Ionomer Multiplet Plasticization |
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