Temperature dependences of viscoelastic characteristics for a model system epoxy resin–glass beads covered with poly(buthylmethacrylate) were studied. The formation of interphase region was established with its own relaxation maximum. The structure of this region is supposed to be a kind of semi‐interpenetrating network formed by crosslinked and linear polymers. Using the Gordon–Taylor equation, the volume fractions of both polymeric components in the interphase region were calculated. An experimental evidence in favor of theoretical calculations has been obtained showing some increase in the glass transition temperature of a two‐phase polymeric system by introducing small amounts of the component with a lower glass temperature as compared with this temperature for the main component.
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Lipatov et al. (1982) studied this question.
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