AbstractMelt blends of polycarbonate and poly(ethylene terephthalate) were prepared and examined for their transitional behavior by thermal analysis and dynamic mechanical testing. A singleTgwas observed for compositions containing more than 60–70 PET by weight while compositions below this range showed two glass transitions. From this it is concluded that PC and PET are completely miscible in the amorphous phase for PET‐rich compositions, whereas PC‐rich blends separate into two amorphous phases which apparently contain both components. Melting point and crystallization behavior are conssistent with these conclusions and suggest that very little if any interchange reactions occur between the ester and carbonate groups during melt m
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机译:摘要 制备了聚碳酸酯和聚对苯二甲酸乙二醇酯的熔融共混物,并通过热分析和动态力学试验检查了其过渡行为。对于PET含量超过60%–70%(按重量计)的组合物,观察到单个Tg,而低于此范围的组合物则显示出两个玻璃化转变。由此可以得出结论,对于富含 PET 的组合物,PC 和 PET 在无定形相中是完全可混溶的,而富含 PC 的混合物则分离成两个显然包含两种成分的无定形相。熔点和结晶行为与这些结论一致,并表明在熔融过程中,酯和碳酸酯基团之间很少发生任何交换反应。
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