纳米碳酸钙/聚苯乙烯复合粒子的制备与表征  

Preparation and Characterization of Nanoscale CaCO_3/PS Particles

作　　者：卢振潇[1] 陈建定[1] 吴秋芳 於定华 

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 [2]上海华明高技术(集团)有限公司,上海200237

出　　处：《华东理工大学学报（自然科学版）》2007年第6期811-815,共5页Journal of East China University of Science and Technology

基　　金：上海市纳米技术专项基金资助项目(0352nm0450652nm039)

摘　　要：通过无皂乳液聚合制备了纳米碳酸钙/聚苯乙烯复合粒子,研究了单体用量对单体转化率和包覆率的影响。利用TGA、TEM、SEM、分光光度计等仪器分析了复合粒子的包覆率、结构形态及其在甲苯中的分散性和稳定性。结果表明:在适当的单体用量下,苯乙烯能以较高转化率聚合并包覆于纳米CaCO3表面;改性后的纳米CaCO3复合粒子在甲苯中的分散性和稳定性良好。将复合粒子分散于苯乙烯中原位合成纳米碳酸钙/聚苯乙烯复合材料,该复合材料的冲击性能比纯聚苯乙烯明显提高。Soapless emulsion polymerization of styrene （St） was carried out on the surface of nanoscale CaCO3. Influences of the amount of monomer on conversion and encapsulation ratio were investigated. The monomer conversion is found to increase with the increasing of St and then to slightly decrease when St is excessive. The morphology of nanoscale CaCO particles after the reaction was observed by TEM, SEM, indicating that CaCO nano particles are encapsulated by PS. The encapsulated CaCO3nano particles were treated bySoxhlet extractor to obtain real encapsulation ratio. From this study, it is found that, with proper amount of monomer, CaCO3nano particles are modified by PS in suitable encapsulation ratio and are well dispersed in toluene to form a stable colloid. The nanoscale CaCO3/PS particles were further used to prepare nanocomposite by in-situ polymerization.

关 键 词：纳米碳酸钙 聚苯乙烯 无皂乳液聚合 纳米复合材料 

分 类 号：TQ327.8[化学工程—合成树脂塑料工业]