一步法反应性共混制备PA66／HDPE合金

在双螺杆挤出机上通过一步法反应性共混制备了聚酰胺66（PA66）/高密度聚乙烯（HDPE）合金。使用扫描电镜，Molau实验等方法研究了共混物的形态，并且比较了由一步法反应性共混得到的合金材料与PA66/HDPE简单共混物，以及二步法共混合金在干，湿态下的力学性能。结果表明：采用将PA66、HDPE、马来酸酐，以及引发剂加入双螺杆挤出机进行一步法反应共混的方法可以得到与二步法共混合金形态和性能相似的塑料合金，PA66的韧性可以得到明显改善。

Preparation of PA66/HDPE Alloy by One-Step Reactive Blending

PA66/HDPE alloys were prepared by a so called one-step reactive blending in a twin screw extruder. The morphology of the alloys was studied using SEM and Molau test. The mechanical properties of the PA66/HDPE alloys under dry and/or wet conditions were also compared with those of PA66/HDPE blends that were prepared through a simple blending of PA66 and HDPE and/or a so called two-step reactive process. The results showed that the alloys prepared through the one step reactive extrusion simply by putting PA66, HDPE, maleic anhydride, and peroxide initiator into a twin screw extruder possessed similar morphology and mechanical properties to the alloys made through the two-step reactive process. Tougheness of the alloys was improved greatly.