PE-HD/纳米SiO_2复合材料的动态流变行为研究  

Dynamic Rheological Behaviour of PE-HD/Nano-SiO_2 Composite

作　　者：王树苹[1] 郁加华[1] 龚方红[1] 

机构地区：[1]江苏工业学院材料科学与工程学院,江苏常州213164

出　　处：《中国塑料》2008年第9期70-73,共4页China Plastics

基　　金：江苏省高校自然科学基金资助项目(05KJB430024)

摘　　要：研究了高密度聚乙烯(PE-HD)/纳米二氧化硅(SiO_2)复合材料的动态流变行为,探讨了纳米 SiO_2经表面偶联剂处理对复合体系的流变行为影响。实验数据显示,PE-HD/SiO_2体系是假塑性流体,黏度随着 SiO_2含量的增加而增加,当>6%时,黏度发生突变,并出现强烈的剪切变稀,在动态储能模量(G′)、损耗模量(G″)与频率(ω)关系曲线上分别出现第二平台,表明体系因粒子间相互关联、团聚及粒子与基体问相互作用而形成局部有序的逾渗网络结构。而纳米 SiO_2经偶联剂处理后,体系流体类型没有改变,体系黏度下降,对应的 G′、G″与ω关系曲线上没有出现第二平台,复合体系更加均匀。Dynamic rheological behaviour of high density polyethylene/nano-silica composites was investigated, and the effect of the surface modification of nano-SiO2 on it was probed. Experimental results show that PE-HD/SiO2 composites belong to pseudoplastic fluid. The viscosity of the composites increased with increasing of SiO2 content. When the content of SiO2 is greater than 6%, the viscosity appears increasing suddenly, and exhibits shear thinning behavior. In the relation curve of the storage moduli （G′）, loss moduli （G″） and frequency（ ω）, there exists a second flat which indicates that a local order percolation network is formed because of particles＇ correlation and glomeration. PE-HD/surfacemodified nano-SiO2 still exhibits pseudoplasic, and its viscosity is lowered. In the relation curve of the storage moduli （G′）, loss moduli （G″） and frequency（ω）, there isn＇t a second flat. The dispersion of nano-SiO2 in the system is more even.

关 键 词：高密度聚乙烯 纳米二氧化硅 逾渗网络结构 动态流变行为 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]