【作者】 王珊； 邹嘉佳； 林聪妹； 陈凡； 李姜； 郭少云；

【Author】 WANG Shan,ZOU Jiajia,LIN Congmei,CHEN Fan,LI Jiang~*,GUO Shaoyun~* (The State Key Laboratory of Polymer Materials Engineering,Polymer Research Institute of Sichuan University,Chengdu, 610065,China)

【机构】 四川大学高分子科学与工程学院高分子材料工程国家重点实验室；

【摘要】 用动态流变学方法研究了反应增容HDPE/PA6体系在60/40（wt/wt）组分比下的线性黏弹行为。研究发现当增容剂JDPE-g-MAH含量达到15phr（C15）以后,低频下共混体系的流变行为表现出临界凝胶行为特征:体系的储能模量（G′）和损耗模量（G″）对频率（ω）依赖关系遵循G′∝ G″∝ω^0.51,损耗角正切值（tanδ）不再依赖ω而趋近于常数1。不同温度下C15体系的动态流变行为表明,温度改变对这种临界凝胶行为特征影响不大,且体系的复数黏度（η*）在低ω下随温度增加改变很小。SEM研究表明,共混体系特殊的流变行为来源于分子链高度缠结,进而使PA6微粒之间形成类网络形式的骨架结构。更多还原

【Abstract】 The dynamic rheological behavior of the reactive compatibihzed HDPE/PA6 blends with the composition of 60/40（wt / wt） were investigated.The linear viscoelasticity of the blends at low frequency presented the characteristics of the critical gel state after that the amount of HDPE-g-MAH（CP） was up to 15 phr,i.e.both the storage modulus G’ and loss modulus G" showed the same dependence on the frequency with G’∝G"∝ω^0.51.Regarding to the C15 blend,the temperature had no influence on this power relation, and also the complex viscosityη^* at the low frequency showed small difference irrespective of the temperature.The SEM observation explained that the special rheological properties could be ascribed to the entanglement of the molecule chains which thus led to the formation of the network structure among the PA6 particles.更多还原