无规共聚聚丙烯中β-晶的增韧作用  

Toughening of Polypropylene Random Copolymer by β-Modification

作　　者：李美[1] 章自寿[1] 谭韵红 戴欣[1] 李谷[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,广东广州510275

出　　处：《中山大学学报（自然科学版）》2015年第5期62-66,共5页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(51173208;51373202);广东省自然科学基金资助项目(S2011020001212);广东省自然科学博士启动基金资助项目(20110171120018)

摘　　要：为提高无规共聚聚丙烯(PPR)冲击强度,制备了庚二酸钙成核PPR和纳米碳酸钙与负载庚二酸钙的纳米碳酸钙填充PPR,采用力学性能测试方法、DSC、XRD和SEM对比研究了其力学性能、结晶性能和β-晶含量。讨论了庚二酸钙和纳米碳酸钙及其负载庚二酸钙的纳米碳酸钙对PPR冲击强度、断裂伸长率、结晶温度和β-晶含量的影响,指出采用负载型β-成核剂是提高PPR韧性的有效方法。In order to improve the impact strength of polypropylene random copolymer（ PPR）,the calcium pimelate nucleated PPR,nano-Ca CO3 and calcium pimelate-supported Ca CO3 filled PPR were prepared. Their mechanical properties,crystallization behavior and the content of β-modification were studied using mechanical testing,differential scanning calorimetry,wide-angle X-ray diffraction and scanning electron microscopy. The effect of calcium pimelate,nano-Ca CO3 and calcium pimelate-supported Ca CO3 on the impact strength,elongation at break,crystallization temperature and β-modification contents of PPR were investigated. The result indicated that using supported β-nucleating agent was an efficient method to increase the β-modification contents and improve the toughness of PPR.

关 键 词：β-成核无规共聚聚丙烯 力学性能 结晶与熔融 

分 类 号：O631.2[理学—高分子化学]