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Dilatometric glass transition temperatures were measured on mixtures of isotactic and syndiotactic poly(methyl methacrylate) and on mixtures of poly(isopropyl acrylate) with poly(isopropyl methacrylate). The glass temperatures of copolymers of isopropyl acrylate with isopropyl methacrylate fall on the same glass temperature versus composition curve as those of the homopolymer mixtures. The data are compared with theoretical predictions of Fox, Gordon and Taylor, and Kanig. None of these treatments can adequately explain the results.
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Krause et al. (1965) studied this question.
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