摘要
聚丙烯/二氧化硅(PP/SiO2)纳米复合材料具有优异的加工、力学、热稳定等性能。如何实现SiO2在PP基体中的均匀分散及提高两相的界面相容性是制备PP/SiO2复合材料的关键。文中利用马来酸酐接枝的氢化苯乙烯-丁二烯-苯乙烯嵌段共聚物(MA-SEBS)作增容剂,采用熔融共混和注塑成型的方法制备了PP/SiO2纳米复合材料;研究了MASEBS对PP/SiO2复合材料的力学性能、断面形貌及结晶行为的影响。结果表明:添加MA-SEBS显著提高了PP/SiO2复合材料的冲击强度,使SiO2在PP结晶过程中能更好地起到异相成核作用,提高了复合材料中PP相的结晶温度、降低了PP的球晶尺寸。
Polypropylene/silica(PP/SiO2)nanocomposites have attracted considerable interests owing to their excellent processability, unique mechanical properties and thermal stability.How to improve the dispersion and interfacial adhesion of PP/SiO2nanocomposites is a major challenge. With maleic anhydride grafted styrene-ethylene/butylene-styrene(MA-SEBS)as compatibilizer, PP/SiO2nanocomposites were prepared via melt mixing and injection molding. The effects of MA-SEBS on dispersion, mechanical properties, crystallization morphologies and crystallization behavior of PP/SiO2nanocomposites were investigated. The results show that the addition of MA-SEBS enhances the interfacial interaction between SiO2and PP, which improves the dispersion of SiO2and the Izod impact strength of PP/SiO2nanocomposites. The nano silica has an obvious nucleating effecton the crystallization,which increases the crystallization temperature of PP phase in nanocomposites and decreases the spherulite size of PP.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2014年第4期85-89,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51035002)
国家重点基础研究发展计划(2012CB025903)
