In this study, porous poly(butylene terephthalate) (PBT) fibers were produced by melt blowing cocontinuous blends of PBT and polystyrene (PS) and selectively extracting the interconnected PS domains. Small amounts of hydroxyl terminated PS additives that can undergo transesterification with the ester units in PBT were added to stabilize the cocontinuous structure during melt processing. The resulting fibers are highly ductile and display fine porous structural features, which persist at temperatures over 150 °C. Single fiber tensile testing and electron microscopy are presented to demonstrate the role of rapid quenching and drawing of the melt blowing process in defining the fiber properties. The templated highly aligned pore structure, which is not easily produced in solvent-based fiber spinning methods, leads to remarkable mechanical properties of the porous fibers and overcomes the notoriously poor tensile properties common to other cellular materials like foams.

中文翻译：

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具有高延展性和高温结构稳定性的多孔熔喷聚对苯二甲酸丁二醇酯纤维


在这项研究中，通过熔喷 PBT 和聚苯乙烯 (PS) 的共连续共混物并选择性地提取互连的 PS 域来生产多孔聚对苯二甲酸丁二醇酯 (PBT) 纤维。添加少量可与 PBT 中的酯单元发生酯交换反应的羟基封端 PS 添加剂，以稳定熔融加工过程中的共连续结构。所得纤维具有高延展性并具有细小的多孔结构特征，该特征在超过 150 °C 的温度下仍能保持。单纤维拉伸测试和电子显微镜展示了熔喷工艺的快速骤冷和拉伸在定义纤维性能方面的作用。模板化的高度排列的孔隙结构在溶剂型纤维纺丝方法中不易产生，从而使多孔纤维具有卓越的机械性能，并克服了泡沫等其他多孔材料常见的众所周知的较差的拉伸性能。