PVC/CaCO_3复合材料的结构与性能研究  

Structure and Properties of PVC/CaCO_3 Composites

作　　者：何杰[1] 吴香发 贾仁广[1] 

机构地区：[1]安徽理工大学化学工程系,安徽淮南232001 [2]浙江中财管道科技股份有限公司,浙江新昌312500

出　　处：《现代塑料加工应用》2007年第4期5-8,共4页Modern Plastics Processing and Applications

摘　　要：研究了表面改性微米重质CaCO_3填充的聚氯乙烯(PVC)树脂所得PVC/CaCO_3复合材料的结构和热力学与机械性能。结果表明,改性微米重质CaCO_3的填充能明显提高PVC基复合材料的缺口冲击强度和维卡软化温度。当填充质量分数20%的改性微米重质CaCO_3后,PVC/CaCO_3复合材料的冲击强度为20.92kJ/m^2,比未加微米重质CaCO_3的提高了49.9%。扫描电镜(SEM)观察复合材料的表面形态,发现拉伸断面有拉丝现象。热失重-差示扫描量热分析发现,微米重质CaCO_3对PVC基复合材料分解有一定的抑制作用。The effect of surface modified micron ground calcium carbonate （μm-GCC） on structural and thermo-mechanical properties of PVC/CaCO3 composites was investigated. The results show that the toughness and Vicat softening temperature（VST） of PVC/CaCO3 composites is improved remarkably by the addition of modified μm-GCC particles. The notched impact strength of the PVC/CaCO3 composites reaches 20.92 kJ/m^2 when μm-GCC is 20G, and is 49.9G higher than the one of no μm-GCC. The morphology of the fracture surface of the composites was observed by SEM. Silk network structure is found only in the composites with the existence of μm-GCC. The analysis of TG-DSC shows that μm-GCC plays a restraining role in the course of PVC pyrolysis.

关 键 词：表面改性重质碳酸钙 聚氯乙烯 超声分散 热-机械性能 复合材料 

分 类 号：TQ327[化学工程—合成树脂塑料工业]