PBT／原位聚合改性凹凸棒粘土纳米复合材料的微结构与粘弹性  

Microstructure and Viscoelasticity of PBT/In-Situ Polymerization Modified AT Nanocomposites

作　　者：潘炳力[1,2] 谈莹莹[1] 宁莉萍[2] 杨生荣[2] 

机构地区：[1]河南科技大学高分子科学与纳米技术重点实验室,河南洛阳471003 [2]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000

出　　处：《高分子材料科学与工程》2009年第4期151-154,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金面上项目(50572107);甘肃省自然科学基金资助项目(3ZS061-A25-034);河南科技大学校基金(2008ZDYY004)

摘　　要：采用原位微乳液聚合法制备了PS修饰的凹凸棒粘土(PS-AT),红外光谱(FT-IR)、透射电镜(TEM)和热重分析(TGA)结果表明,PS已成功地修饰到AT表面。将所得PS-AT与PBT共混制备了PBT/PS-AT复合材料,场发射扫描电镜(FE-SEM)结果表明,复合材料中PS-AT含量较低时可得到纳米级的良好分散,且界面相容性较好;而当PS-AT含量较高时,团聚现象出现,复合材料相界面变差。这与复合材料的粘弹性的变化趋势一致,即PS-AT的加入可以使复合材料的复数黏度升高以及抗蠕变性能改善,而随着PS-AT含量的增加,复数黏度和抗蠕变性能变化不明显。PS/attapulgite （PS-AT） nanoparticles were synthesized by in-situ microemulsion polymerization. The morphology of the nanoparticles were characterized by means of TEM, FT-IR and TG. The experimental results show that the PS molecules are successfully bonded to the AT surface. PBT/PS-AT nanocomposites were prepared by melt compounding. The FE-SEM results show that a nanoscale dispersion of AT throughout the PBT matrix for lower AT content is achieved and interface adhesion is strong, however, aggregates of AT appear for the composites with higher AT content and interface adhesion weakens. These are consistent with the viscoelasticity of the PBT/PS- AT nanocomposites, ie. complex viscosity and creep resistance of the composites with lower PS-AT content are greatly improved, and those are not changed a lot with higher PS-AT content.

关 键 词：微乳液聚合法 凹凸棒粘土 表面改性 微结构 粘弹性 

分 类 号：TB383[一般工业技术—材料科学与工程]