基于粒径及填充量影响的聚乙烯/氧化铝流变模型的建立  

Establishment of the Rheological Model of Polyethylene/Alumina Considering the Influence of Particle Size and Filling Amount

作　　者：张秘滔 谢林生[1] 马玉录[1] 李果[1] 单喜良 Mitao Zhang;Linsheng Xie;Yulu Ma;Guo Li;Xiliang Shan(Engineering Center of Efficient Green Process Equipment and Energy Conservation of Ministry of Education,East China University of Science and Technology,Shanghai200237,China)

机构地区：[1]华东理工大学绿色高效过程装备与节能教育部工程研究中心

出　　处：《高分子材料科学与工程》2019年第9期103-108,共6页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51273065)

摘　　要：研究了氧化铝粒径及填充量对聚乙烯/氧化铝复合材料流变行为的影响,在此基础上建立了考虑粒径及填充量影响的聚乙烯/氧化铝流变模型。通过双转子连续混炼挤出机制备不同填料粒径及填充量的聚乙烯/氧化铝复合材料,对其进行稳态及动态流变测试,结合储能模量判断填料网络的形成,并通过对稳态黏度进行非线性回归建立修正流变模型。结果表明,对于纳米氧化铝,随着填充量的增大,复合体系黏度和模量增大,零切黏度和松弛时间延长,且当填料量为10%时,开始形成填料网络结构,出现了类液态至类固态转变;对于微米氧化铝,随着粒径的增大,复合体系的黏度和模量先增大后减小,零切黏度和松弛时间先增长后降低,但在填料量为12%时,仍未形成填料网络结构。The effect of the alumina particle size and filling amount on the rheological behavior of polyethylene/alumina was investigated and the rheological model of polyethylene/alumina considering the influence of particle size and filling amount was established. The polyethylene/alumina composites with different filler particle sizes and loadings were subjected to steady and dynamic rheological tests, and the formation of the filler network was analyzed through the storage modulus, and a modified viscosity model was established by nonlinear regression of the steady viscosity. The results show that for nano-alumina, the viscosity and modulus of the composite systems increase with the increase of the loading, and the zero-viscosity and relaxation time increase, the filler network starts to form near 10% filler loading, and a liquid-like to solid-state transition occurs;for micron-alumina, as the particle size increases, the viscosity and modulus of the composite systems increase, and the zero-viscosity and relaxation time increase. But when the filler amount is 12%, no filler network structure is formed.

关 键 词：氧化铝 动态流变行为 填料网络 修正流变模型 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]