Abstract In this work, an unprecedented methodology has been proposed to manufacture high-performance polymer composites, that is, a continuously and intensively elongational flow field created by an original and revolutionary eccentric rotor extruder (ERE) is implemented in the whole melting, plasticizing and blending process. Which subverts traditional processing methods of the shear flow field in twin-screw extruder and mixer. A super-toughed poly(lactide acid) (PLA)/thermoplastic poly(ester)urethane (TPU) nanofiber composites, possessing in-situ formed aligned TPU nanofibers (TNFs) and favorable interfacial adhesion, were prepared by the methodology, in which the TNFs could act as effective heterogeneous nucleating sites and elevate extraordinarily notch impact strength. When TPU content reaches to 25 wt%, the notch Izod impact strength reached to 73.5 and 58.3 kJ/m2 for the impact direction parallel and perpendicular to the TNFs, respectively, approximately being 30 and 20 times than that of neat PLA; and the elongation at break reach to 113%, approximately being 12 times. The unique PLA/TPU nanofiber composites manufactured in industrial approach with the novel structure of aligned TNFs is reported for the first time and exhibits prospect for development for miscellaneous functional applications.

中文翻译：

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超韧聚（乳酸）/热塑性聚（醚）氨基甲酸酯纳米纤维复合材料，由创新的偏心转子挤出机制备的对齐纳米纤维原位形成

摘要 在这项工作中，提出了一种前所未有的制备高性能聚合物复合材料的方法，即由独创的革命性偏心转子挤出机 (ERE) 在整个熔融、塑化和混合过程。颠覆了双螺杆挤出机和混合机剪切流场的传统加工方式。通过该方法制备了具有原位形成的排列的 TPU 纳米纤维 (TNF) 和良好的界面粘附力的超韧聚丙交酯 (PLA)/热塑性聚(酯)氨基甲酸酯 (TPU) 纳米纤维复合材料，其中TNFs 可以作为有效的异质成核位点，并显着提高缺口冲击强度。当 TPU 含量达到 25 wt% 时，在平行和垂直于TNFs的冲击方向上，缺口伊佐德冲击强度分别达到73.5和58.3 kJ/m2，约为纯PLA的30和20倍；断裂伸长率达到113%，约为12倍。首次报道了以工业方法制造的具有对齐 TNF 的新型结构的独特 PLA/TPU 纳米纤维复合材料，并展示了各种功能应用的发展前景。