回流对不相容体系共混物分布混合效果的影响

摘要

对啮合同向双螺杆挤出机熔体输送段6种不同螺杆构型所彤成的流场进千亍了数值侯拟，并进行了实验研究。结果表明，增大回流系数能增强共混物的分布混合效果，并且回流系数越大，分布混合效果越好。%The flow fields of six different screw configurations at melt conveying section in an intermeshing co-rotating twin-screw extruder were simulated and the corresponding experiments were carried out. It showed that increasing the backflow coefficient enhanced the distributive mixing effect of polymer blend, and the greater the backflow coefficient was, the better the distributive mixing performance was observed.