采用溶液共沉降的方式制备了不同比例的含二氮杂萘酮结构聚醚酮酮 (PPEKK)和聚苯硫醚 (PPS)共混物。用毛细管流变仪测定了PPEKK /PPS共混物的流变性能。结果发现在所研究的温度和剪切速率范围内 ,PPEKK/PPS共混物熔体为假塑性流体 ,其熔体表观粘度随PPS含量的增加 ,温度的升高 ,剪切速率的增大而下降 ,熔融活化能随剪切速率的增大而降低。对挤出样条的胀大比率、外观形貌研究表明 ,PPS的加入不仅有利于改善PPEKK的熔融加工性 ,还能改善成品尺寸稳定性和外观。 Different proportions of PPEKK and PPS blends were prepared by coprecipitation. The rheological properties of PPEKK / PPS blends were determined by capillary rheometer. The results showed that the melt of PPEKK / PPS blends was pseudoplastic fluid in the range of temperature and shear rate studied. The apparent viscosity of the melt increased with the increase of PPS content, temperature and shear rate While the melting activation energy decreases with the increase of shear rate. The swollen ratio of the extruded spline, the appearance of the study showed that the addition of PPS is not only conducive to improving the melt processability of PPEKK, but also improve the dimensional stability of the finished product and appearance.