三螺杆挤出共混聚酰胺66/聚苯醚的工艺参数优化分析

基于具有高黏度比的聚酰胺66/聚苯醚共混体系，研究了倒三角排列的三螺杆挤出机（TTSE）的工艺参数对共混物混合效果的影响。通过Box-Behnken响应面设计并分析实验结果，发现螺杆转速、产量和分散相占比对共混效果均有一定影响，通过工艺优化能够获得良好的分散效果；通过对比相同工艺下三、双螺杆挤（TSE）出机的共混效果，证明了拉伸流场对于共混效果和材料性能有明显的改善。

Optimization of processing parameters for the blending of polyamide-66/polyphenylene oxide using a triple-screw extruder

The effect of varying the processing parameters of a triangular array triple-screw extruder (TTSE) in polymer blending has been studied using polyamide-66/polyphenylene oxide (PA66/PPO) as an example of a typical polymer blend with high viscosity ratio.The Box-Behnken response design method was utilized to analyze the experimental results.The screw speed,output and percentage of dispersion were shown to have significant impacts on the morphology of the resulting blends.A finer dispersion of PA66/PPO blends was achieved after optimization analysis.A comparative study of a twin screw extruder (TSE) and TTSE in PA66/PPO blending showed that the extensional flow in the TTSE could efficiently improve the dispersion and mechanical properties of the resulting blends.