纳米和微米碳酸钙填充β-聚丙烯的结晶行为与熔融特性  

Crystallization Behavior and Melting Characteristic of Micro-and Nano-CaCO_3 Filled β-Polypropylene Composites

作　　者：章自寿[1] 张扬帆[1] 张均萍[1] 麦堪成[1] 

机构地区：[1]中山大学化学与化学工程学院材料科学研究所//聚合物基复合材料及功能材料教育部重点实验室//广东省高性能树脂基复合材料重点实验室//广东省消防科学技术重点实验室,广东广州510275

出　　处：《中山大学学报（自然科学版）》2013年第6期81-85,92,共6页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(51173208;51373202);广东省自然科学重点基金资助项目(S2011020001212);高等学校博士学科点专项科研基金(20110171120018)

摘　　要：为利用高韧性β-PP制备高性能碳酸钙填充PP复合材料,该文采用负载β-成核剂的纳米碳酸钙(β-CC)、纳米碳酸钙(CC)和微米碳酸钙(WC)填充PP制备β-PP复合材料。结晶行为与熔融特性的DSC结果表明,加入CC和WC提高PP结晶温度,β-CC填充PP复合材料的结晶温度高于CC和WC填充PP,表明β-CC对PP结晶的异相成核作用高于CC和WC。XRD结果表明,CC和WC填充PP复合材料主要形成α-晶,β-CC填充PP复合材料主要形成β-晶。采用β-CC可制备高β-晶含量的碳酸钙填充PP复合材料。In order to obtain high performance PP composites using high toughnessβ-PP,theβ-PP com-posites were prepared by PP filled nano-CaCO3 （CC）supported β-nucleating agent （β-CC）,CC and micro-CaCO3 （MC ）. The result of differential scanning calorimetry indicated that the crystallization peak temperatures of PP increased by adding MC,the crystallization peak temperatures ofβ-CC filled PP composites were higher than those of composites filled by MC and CC,and the heterogeneous nucleation ofβ-CC was higher than those of MC and CC for iPP crystallization.The results on wide-angle X-ray dif-fraction analysis demonstrated that the MC and CC filled iPP composites mainly formedα-crystal,and theβ-CC filled composites mainly formed β-crystal.The β-iPP composites with high filler could be prepared by adding β-CC into iPP matrix.

关 键 词：聚丙烯 碳酸钙 β-成核作用 结晶 熔融行为 

分 类 号：O631.5[理学—高分子化学]