【摘要】 采用DMA、SEM、FTIR和力学性能测试等方法,研究了4,4’-二氨基二苯砜（DDS）固化的双酚A二缩水甘油醚（DGEBA）／聚碳酸酯（PC）共混体系的相结构、交换反应及力学性能.固化后的共混体系只显示单一玻璃化转变温度,表明该热固性聚合物共混体系是均相的.FTIR测试揭示了PC在共混固化过程中发生了显著的酯交换反应.力学测试结果表明,其模量、拉伸强度、断裂伸长率和应力场强度因子（KIC）都没有明显变化。更多还原

【Abstract】 Epoxy resin of bisphenol A type(ER)/polycarbonate(PC) blends cured with 4, 4’-diaminodiphenyl sulfone(DDS) were prepared. Dynamic mechanical analysis showed that the DDS-cured ER/PC blends had only single Tg, indicating the cured blend system is of single-phase.SEM also revealed the homogeneity of the blends. An interesterification reaction between ER and PC in the blends could be concluded from the observations of the shift to low frequencies of the streching vibration bands of carbonyl group of the blends. Addition of PC had little influence on the modulus, tensile strength, tensile elongation and fracture toughness of the blends, which could be ascribed to the phase structure and interesterification occurred during the preparation of the blends.更多还原