聚丙烯/镧化合物改性超细碳酸钙复合材料的研究  

Composites of PP and Ultra-fine CaCO_3 Modified by La^(3+) Compound

作　　者：郭涛[1] 王炼石[1] 

机构地区：[1]华南理工大学材料学院,广东广州510640

出　　处：《中国塑料》2004年第7期23-27,共5页China Plastics

摘　　要：采用熔融共混法制备了聚丙烯 /镧化合物改性超细碳酸钙 (PP/UCaCO3 La3 + )和聚丙烯 /超细碳酸钙 (PP/UCaCO3 )两种复合材料。力学性能测试表明 :复合材料的冲击强度随着填料用量的增加先增后减 ,拉伸强度则递减。PP/UCaCO3 La3 + 的冲击强度高于PP/UCaCO3 ,可提高至PP的 3倍以上。透射电镜和扫描电镜分析表明 :UCaCO3 La3 + 在PP中具有很好的分散性 ,随着镧化合物用量的增加而进一步改善。DSC分析表明 ,UCaCO3 La3 + 可显著提高复合材料的结晶温度和结晶度 ,结晶性能的改善是材料冲击强度提高的重要原因。热重分析结果表明 :与UCaCO3相比 ,UCaCO3 La3 +Composites of PP with lanthanum compound modified ultra-fine CaCO 3 (PP/UCaCO 3-La 3+) and with unmodified CaCO 3 (PP/UCaCO 3) were prepared via melt extrusion. Transmission electron microscope and scanning electron microscope showed that the modification of lanthanum compound improved the dispersion of CaCO 3 in PP matrix. The degree of crystallinity and crystallization temperature of PP were well increased by the lanthanum compound modified filler, which resulted in the increase in impact strength and thermal stability.

关 键 词：镧化合物 超细碳酸钙 聚丙烯 力学性能 结晶性能 热稳定性 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]