中文摘要：

运用有限元分析软件Polyflow对不同结构和不同螺杆转速下的修正Maddock混炼元件流场进行三维非等温数值模拟，得到了流场的压力、速度、温度和剪切速率的分布；利用粒子示踪法（PTA）对不同结构和不同螺杆转速的修正Maddock混炼元件流场内聚合物熔体所经历的混合过程进行模拟，并对结果进行了统计学分析；通过比较平均解聚功等参数对不同结构和不同螺杆转速下修正Maddock混炼元件的分散混合效果进行分析研究，并借助实验进行验证。结果表明，等腰反向型修正Maddock}昆炼元件对聚合物熔体的剪切作用和分散混合性能最好；适当提高螺杆转速可以有效地促进物料的分散混合。

英文摘要：

In this paper, the three-dimension non-isothermal flow of modified Maddock mixers was numerically simulated by Polyflow. The profiles of pressure, velocity, temperature, and shear rate were obtained. Statistical analysis was performed on the mixing process of polymer melts in different structures and screw rotating speeds through particle tracking analysis （PTA）, using ＂average deagglomerating energy＂ as a key parameter. The result of simulation was compared with experiments. It showed that the isosceles inverse modified Maddock mixer could provide sufficient shear force for excellent dispersion of polymer melt. Increasing in screw rotating speed could effectively enhance the dispersive mixing capacity.