有机粘土对聚碳酸酯/聚苯乙烯共混物增韧、热性能和力学性能的影响
Effect of Organoclay on Compatibilization, Thermal and Mechanical Properties of Polycarbonate/Polystyrene Blends
摘要：
采用熔融共混技术制备了原始和有机粘土改性的聚碳酸酯/聚苯乙烯（PC/PS）共混物。这些共混物的特征在于它们的形态，结构，热和机械性能。虽然我们的FTIR和XRD结果表明PC和PS相之间存在弱相互作用，但是DSC和形态学研究表明原始PC/PS共混物是不相容的。另一方面，有机粘土的引入导致两种聚合物相的相容化，这由组分相的玻璃化转变温度的显著变化和在亚微米尺度上没有相分离的独特形态支持。粘土廊道内的聚合物的插层实现，并支持XRD研究。与PC/PS共混物相比，相容化共混物具有更好的热稳定性和更高的模量值，这也支持了有机粘土对PC/PS共混物基体的增强作用。
英文摘要：
Pristine and organoclay modified polycarbonate/polystyrene (PC/PS) blends are prepared using melt-mixing technique. These blends are characterized for their morphology, structural, thermal and mechanical properties. Though our FTIR and XRD results show weak interactions between PC and PS phases, however, DSC and morphological study reveals that pristine PC/PS blends are immiscible. On other hand, introduction of organoclay results compatibilization of two polymer phases which is supported by significant shift in glass transition temperatures of the component phases and a distinct morphology having no phase segregation on sub-micron scale. Intercalation of polymers inside the clay gallery is achieved and is supported by XRD studies. A better thermal stability and higher value of modulus of the compatibilized blends compared to pristine PC/PS blends also support the reinforcement effect of organoclay to the PC/PS blend matrix.
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