高温引发剂DMDPB在一步法制备PA66/HDPE合金中的应用

Application of High Temperature Initiator DMDPB in the Preparation of PA66/HDPE Alloy Prepared in One-step

采用2,3-二甲基-2,3-二苯基丁烷(DMDPB)为高温引发剂,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)/聚乙烯合金。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/聚乙烯简单共混物、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、高密度聚乙烯(HDPE)、马来酸酐、以及高温引发剂DMDPB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。

PA66/HDPE alloys were prepared by a so called one-step reactive compatibilization process in which HDPE,2,3-dimethyl-2,3 diphenylbutane (DMDPB) and PA66 were added in twin screw extruder.The morphology of the alloys was studied using SEM and Molau experiment,the mechanical properties of the PA66/HDPE alloys under dry or/and wet conditions were also compared with those of PA66/HDPE blends prepared through a simple blending of PA66 and HDPE with or without HDPE grafted maleic anhydride compatibilizer.The results showed that the alloys possed similar morphology and mechanical properties to those of the blends of PA66 and HDPE with compatibilizer.