HIPS填充体系的流变行为研究  

Rheological Behavior of Nano - TiO_2/HIPS Matrix

作　　者：王新[1] 王兆波[1] 吴其晔[1] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《材料科学与工艺》2005年第6期633-636,共4页Materials Science and Technology

基　　金：国家自然科学基金资助项目(50273016)

摘　　要：采用Rosand Presicion Rheometer研究了nano-TiO2/HIPS填充体系流变性能．结果表明,刚性聚合物HIPS内的纳米分散相具有增大体系的自由体积效应,nano-TiO2对HIPS的表观粘度影响较小．EVA的加入有助于流动中nano-TiO2团聚结构的破坏分散,流动曲线所显示的屈服现象和非牛顿指数的变化规律都表明了熔体流动中存在nano-TiO2团聚结构的演化．The rheological behaviors of nano - TiOE/HIPScomposites were investigated with Rosand Presicion Rheometer in the present paper. The results showed that the introduction of TiO2 into HIPS influenced the apparent viscosity （ηa） of the composites to a rather little extent. Moreover, TiO2 exhibited an unusual effect on the non - Newton index of the composites at high shear rate. Both the phenomena indicated the increase of inner free -volume induced by TiO2 in molecularly rigid HIPS, segment and then the dispersion of the agglomerates of TiO2 yielding in the flow after the introduction of EVA, as well as The further study showed that EVA helped the in the flow, which was featured by the distinct the large changing of non - Newton index.

关 键 词：HIPS 流变性 屈服 团聚结构 自由体积 

分 类 号：TB332[一般工业技术—材料科学与工程]