温差共混法制备聚丙烯／热致液晶原位增强复合材料

In-situ Reinforced PP/TLCP Composite Prepared by Temperature Difference Blending

采用温差共混法制备了聚丙烯／热致液晶（PP／TLCP）原位增强复合材料，研究了其共混物微观形貌以及力学性能。SEM分析表明，TLCP在体系中的成纤效果受到其含量的影响，当TLCP含量达到30％时，体系的表层和芯层均形成取向良好的TLCP纤维。力学性能分析表明，当TLCP含量低于20％时，PP／TLCP共混物的拉伸强度和拉伸模量均随着TLCP含量的增加而提高，断裂伸长率则有所下降。

Temperature difference blending （TDB） was applied to the preparation of PP/TLCP in situ reinforcement composites. Scanning electron micrographs （SEM） revealed that the deformation of TLCP from droplets to fibrils in PP/TLCP system was affected by the content of the TLCP. While the loading of TLCP approached 30 %, TLCP fibrils took preferred orientation in both skin and core of the composites. The tensile strength and modulus increased with increasing content of TLCP （below 20 % ） at a cost of decreasing elongation at break.