Mechanical behavior of polycarbonate/phenoxy blends before and after interchange reactions

Melt-mixed blends of polycarbonate/phenoxy were obtained before and after Interchange reactions by controlling the processing time. The dynamic mechanical analysis of the physical and reacted blends confirmed the immiscibility of the pair and the displacement of the glass-transition temperatures of the mixtures; this displacement was seen more clearly in the reacted mixtures, and at phenoxy-rich contents, even a single phase can appear. The exchange reactions resulted in a mechanical behavior that showed both a higher modulus and greater tensile strength in the reacted blends. The ductility was close to linearity for the physical blends and probably would be improved in the reacted mixture with a lower processing time.

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