为解决聚苯醚( PPE)和尼龙66( PA66)的相容问题,选用柠檬酸进行原位增容,采用两种不同的挤出共混方式制备PPE/PA66合金,并与现有增容剂PPE-g-MAH的增容效果进行了对比.考察增容剂对合金力学性能和微观形貌的影响,并探讨柠檬酸的增容机理.结果表明,柠檬酸原位增容时,选用两步挤出工艺,能够得到力学性能优良的合金,当柠檬酸用量为1份时,合金的拉伸强度为70.31 MPa,弯曲强度为89.23 MPa,冲击强度为15.76 kJ/m2.用柠檬酸原位增容时,合金的分散相尺寸明显减小,均匀性得到改善..%Poly (phenylene ether) / nylon 66 (PPE / PA66) alloys in-situ compatilized by citric acid were prepared by two different extrusion blending methods in order to solve the compatibility problems of the alloys, the compatibilizing effect of citric acid was compared with that of PPE-g-MAH. The effects of two compatibilizers on the mechanical properties and microstructure of the alloys were investigated, and the compatibilization mechanism of citric acid was discussed. The results showed that when citric acid was used for in-situ compatibilizating the alloys and two-step extrusion processing technology was adopted, the alloys with excellent mechanical properties could be obtained, when the content of citric acid was 1 phr, the tensile strength, flexural strength and impact strength of the alloys could reach 70.31 MPa,89.23 MPa and 15.76 kJ/m2 respectively. The dispersed phase size of the alloys decreased obviously and the dispersion uniformity was improved when citric acid was adopted.
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