粒子填充HDPE复合体系动态流变行为研究  

Dynamic Rheological Behavior of Particles-filled HDPE Composite Systems

作　　者：董琦琼[1] 郑强[1] 杜淼[1] 

机构地区：[1]浙江大学高分子科学与工程学系,杭州310027

出　　处：《高等学校化学学报》2005年第9期1761-1764,共4页Chemical Journal of Chinese Universities

基　　金：国家杰出青年科学基金(批准号:50125312);国家自然科学基金重点项目(批准号:50133020);国家重大基础研究"九七三"计划项目(批准号:G1999064800)资助.

摘　　要：研究了炭黑(CB)和石墨(GP)填充高密度聚乙烯(HDPE)复合体系的动态流变行为.发现高填料含量时出现似固体行为,并认为它归因于无机粒子网络逾渗结构的形成.在相同聚合物基体条件下,粒子种类和粒子几何参数(粒子形状、大小、粒径分布)对低频区域流变行为、流变参数的逾渗行为和逾渗阈值(φc)有决定性影响,且种类的影响相比于粒子几何参数更为显著.此外,高表面活性及高比表面积(大径厚比、小尺寸)粒子填充体系具有较低的φc.The dynamic rheological behavior of the high-density polyethylene （HDPE） filled with carbon black （CB）, or graphite（GP）, i.e. HDPE/CB and HDPE/GP composites, was studied. The pseudo-solidlike behavior appearing in high-loaded composites could be attributed to the formation of the fiUer percolated network structure. In the composites with the same matrix, the filler kind and the geometric parameters of filler（ particle shape, particle size and particle size distribution） play an important role in the dynamic theological properties at low frequencies, the percolation behavior of the theological parameters and the percolation threshold （φc）. Compared with the geometric parameters of the filler particles, the filler kind exerts a more striking influence on them. The composites fiUed with particles having a large surface activity and large specific surface area possess a lower value of φc.

关 键 词：粒子填充复合材料 动态流变行为 似固体行为 逾渗阈值 

分 类 号：O631[理学—高分子化学]