烷基化纳米SiO_2/MMA乳液聚合物的表征及对PC的改性效果  

CHARACTERIZATION OF EMULSION POLYMERIC PRODUCT OF ALKYL -NANO-SiO_2/MMA AND MODIFYING PC WITH IT

作　　者：钱翼清[1] 赵平[1] 王卫华[1] 

机构地区：[1]南京工业大学材料科学与工程学院,南京210009

出　　处：《复合材料学报》2003年第1期79-84,共6页Acta Materiae Compositae Sinica

基　　金：高分子材料工程国家重点实验室资助项目(1998);江苏省科委资助项目(BJ98062)

摘　　要：　用TEM,FTIR分析研究了烷基化纳米SiO2/MMA乳液聚合产物的结构。结果表明,乳液聚合产物的粒子基本呈球形,由核壳组成,中心为SiO2核,外围为PMMA壳,核壳之间存在化学键。并在适量第三组分配合下能大幅度提高PC的韧性、加工流动性及耐热性,还研究了其增韧机理。Surface of nanoSiO2 particles was covered with PMMA by emulsion polymerization to prevent their reunion. The structures of emulsion polymeric products of alkylnanoSiO2/MMA were characterized by TEM and FTIR. The results indicate that the particles of emulsion polymeric products are approximate ball in shape and that the particle consists of centered core(SiO2) and shell (PMMA) and that chemical bonds exist between the core and shell of alkylaednanosilica/PMMA. The toughness, process flowability and heat resistance of PC were notably raised by coreshell particles of alkylatednanosilica/PMMA with the cooperation of a third component.Its toughening mechanism was studied with the newest theory of multilayer crack extension.

关 键 词：烷基化纳米Si02/MMA乳液聚合物 表征 PC 改性 聚碳酸酯 二氧化硅 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业] TQ316.6