Joshua W. Goetze, Cesar Benitez, Frank S. Bates* and Christopher J. Ellison*,
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引用次数: 0
摘要
在这项研究中,通过熔融吹制聚对苯二甲酸丁二醇酯(PBT)和聚苯乙烯(PS)的共混物,并选择性地提取相互连接的 PS 结构域,生产出了多孔聚对苯二甲酸丁二醇酯(PBT)纤维。在熔融加工过程中,加入少量可与 PBT 中的酯单元发生酯交换反应的羟基端 PS 添加剂,以稳定椰壳结构。由此制成的纤维具有很高的延展性,并显示出细微的多孔结构特征,这些特征在温度超过 150 °C 时仍能保持。单根纤维拉伸测试和电子显微镜显示了熔体吹塑过程中快速淬火和拉伸在确定纤维特性方面的作用。在溶剂型纤维纺丝方法中不易产生的模板化高度排列的孔隙结构,使多孔纤维具有显著的机械性能,并克服了泡沫等其他蜂窝材料常见的众所周知的拉伸性能差的问题。
Porous Melt Blown Poly(butylene terephthalate) Fibers with High Ductility and High-Temperature Structural Stability
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.
期刊介绍:
ACS Macro Letters publishes research in all areas of contemporary soft matter science in which macromolecules play a key role, including nanotechnology, self-assembly, supramolecular chemistry, biomaterials, energy generation and storage, and renewable/sustainable materials. Submissions to ACS Macro Letters should justify clearly the rapid disclosure of the key elements of the study. The scope of the journal includes high-impact research of broad interest in all areas of polymer science and engineering, including cross-disciplinary research that interfaces with polymer science.
With the launch of ACS Macro Letters, all Communications that were formerly published in Macromolecules and Biomacromolecules will be published as Letters in ACS Macro Letters.