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使用不同原始颗粒尺寸的聚酚氧(PHE)通过双螺杆挤出机分别与尼龙(PA)66共混制备PA66/PHE共混物。测试其力学性能,并用扫描电子显微镜(SEM)表征。研究发现,小颗粒尺寸的PHE制备的PA66/PHE共混物的分散相尺寸小、分散均匀且冲击强度得到提高,呈现协同效应,而拉伸强度基本与纯PA66保持一致;大颗粒尺寸的PHE制备的PA66/PHE共混物的分散相尺寸较大且容易发生团聚,其冲击强度降低,而拉伸强度有所增加。
PA66 / PHE blends were prepared by blending with nylon (PA) 66 using a polyphenylene oxide (PHE) of varying primary particle size through a twin-screw extruder, respectively. The mechanical properties were tested and characterized by scanning electron microscopy (SEM). The results showed that PA66 / PHE blends prepared by PHE with small particle size had the advantages of small size, uniform dispersion and improved impact strength, showing a synergistic effect. The tensile strength of PA66 / PHE blends was basically the same as that of pure PA66. Large particle size PHE The prepared PA66 / PHE blends have larger dispersed phase size and easy agglomeration, the impact strength is decreased and the tensile strength is increased.