纳米碳酸钙/聚苯乙烯原位复合材料的制备及表征  

Preparation and Characterization of in-situ Nano Calcium Carbonate/Polystyrene Composite

作　　者：翁盛光[1] 陈建定[1] 夏浙安[1] 章圣苗[1] 吴秋芳[1] 

机构地区：[1]华东理工大学材料科学与工程学院,国家超细粉末工程研究中心,上海200237

出　　处：《过程工程学报》2007年第4期790-795,共6页The Chinese Journal of Process Engineering

基　　金：上海市科委纳米专项基金资助项目(编号:0352nm045;0652nm039)

摘　　要：将纳米碳酸钙（Nano-CaCO3）颗粒先从水相中转移至醇相中,再通过甲基丙烯酸处理,在颗粒表面包覆了既具离子键又具聚合反应活性的表面层.在稍高于100℃温度下,经该项处理后的纳米CaCO3固含量大于80%的滤饼能均匀分散于苯乙烯单体中,用原位本体聚合法制得纳米CaCO3/PS（聚苯乙烯）原位复合材料.TEM分析表明,原位复合材料中纳米CaCO3颗粒能均匀分散于基体中,粒径在100 nm以内,并由此提出分散相呈集散形貌的结构模型.纳米碳酸钙能对复合材料基体起到较好的增韧作用,含7%～8%纳米CaCO3的原位复合材料的冲击强度比纯PS提高158%.CaCO3 nano-particles transferred from water phase into ethanol were treated by methacrylic acid to form reactive interface by ionic bonding. Well dispersed CaCO3 nano-particles in styrene obtained from the filtermass of treated CaCO3 nano-particles with solids content more than 80% at a temperature slightly higher than 100 ℃ were polymerized via in-situ bulk polymerization to produce nano-CaCO3/polystyrene composite. TEM images show that CaCO3 nano-particles with the sizes less than 100 nm were distributed homogeneously in polymer matrix. CaCO3 nano-particles can play a positive role to increase the toughness of composite material matrix, and the toughness of the composite with 7%-8% CaCO3 nano-particles can be improved up to 258% of pure polystyrene. The structure model of pool dispersion was proposed and used to explain the relationship between toughness and structure of the composite.

关 键 词：纳米碳酸钙 聚苯乙烯 复合材料 制备 集散型结构模型 

分 类 号：TQ325[化学工程—合成树脂塑料工业]