In this study, polypropylene (PP) binary blends with obviously different molecular weight were produced and melt spun using a capillary rheometer aided with an aspirator for aerodynamic stretching for the first time. A comprehensive processing map on the spinnability of all the seven PP blends regarding to three extrusion speeds and six take-up pressures was originally presented. According to a detailed investigation on the diameter information and tensile properties of all the PP fibers (modulus, tenacity, elongation at break), the optimum processing parameters of the advanced technology of aspirator for preparing PP fibers were revealed: processing temperature at 250°C, extrusion speed at 0.075 mm/s and take-up pressure at 1.5 bar. Most importantly, the reliability of a novel mathematic model was verified to predict PP fiber diameters in this study, which provides practical guidance for the research or mass production of PP blend fibers in the academia and industry.

中文翻译：

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吸气辅助熔纺二元共混聚丙烯纤维的可纺性和力学性能研究

在这项研究中，首次使用毛细管流变仪和吸气器辅助进行空气动力学拉伸，生产并熔纺具有明显不同分子量的聚丙烯 (PP) 二元共混物。最初提供了关于所有七种 PP 混合物在三种挤出速度和六种卷取压力下的可纺性的综合加工图。根据对所有PP纤维的直径信息和拉伸性能（模量、强度、断裂伸长率）的详细调查，揭示了用于制备PP纤维的先进抽吸技术的最佳加工参数：加工温度为250°C ，挤出速度为 0.075 毫米/秒，卷取压力为 1.5 巴。最重要的是，