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首页> 外文期刊>繊維学会誌 >A Novel Random Preferential Orientation of the Crystal A-axis Along the Radial Direction Confirmed on the Poly-p-phenylenebenzobisoxazole (PBO) Fiber Made with a Water Vapor Coagulation Method
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A Novel Random Preferential Orientation of the Crystal A-axis Along the Radial Direction Confirmed on the Poly-p-phenylenebenzobisoxazole (PBO) Fiber Made with a Water Vapor Coagulation Method

机译：水蒸气凝结法制备的聚对苯撑苯并双恶唑（PBO）纤维证实了晶体A轴沿径向的新的随机优先取向。

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摘要

This article concerns PBO fiber structure, especially a preferential orientation of the a-axis of the PBO crystal in the fiber. It has been reported that the a-axis of the PBO crystal aligns parallel to the radial direction on the round cross section for PBO AS and BM fibers. This observation was proved by selected-area electron diffraction and micro-focus X-ray diffraction. An application of water vapor coagulation is carried out in this study. It is proved that the fiber so made shows a random orientation of the PBO crystal a-axis on the cross section. This fact has never been reported on any scientific or engineering journals before as far as the authors have concerned and it becomes state-of-the-art in this study. A mechanism to explain the presence and/or absence of such preference is proposed. The authors believe that the presence of this radial preferential orientation comes from a combination or a balance of polymer-solvent interaction and the direction of diffusion for solvent from the center to the outside of the fiber.
机译：本文涉及PBO纤维的结构，特别是纤维中PBO晶体的a轴的优先取向。据报道，对于PBO AS和BM纤维，PBO晶体的a轴与圆形截面上的径向平行。通过选择区域电子衍射和微焦点X射线衍射证明了该观察结果。在这项研究中进行了水蒸气凝结的应用。证明了如此制成的纤维在横截面上显示出PBO晶体a轴的随机取向。就作者而言，这一事实从未在任何科学或工程杂志上报道过，它已成为这项研究中的最新技术。提出了解释这种偏好的存在和/或不存在的机制。作者认为，这种径向优先取向的存在是由于聚合物-溶剂相互作用和溶剂从纤维中心到外部的扩散方向的组合或平衡。

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  • 来源
    《繊維学会誌》 |2015年第7期|224-231|共8页
  • 作者

    Kitagawe Tooru; Kiriyama Kohei; Shimizu Yusuke;

  • 作者单位

    Toyobo Co Ltd, Corp Res Ctr, Membrane Struct Dev Grp, Otsu, Shiga 5200292, Japan;

    Toyobo Co Ltd, Corp Res Ctr, Membrane Struct Dev Grp, Otsu, Shiga 5200292, Japan;

    Toyobo Co Ltd, Corp Res Ctr, Membrane Struct Dev Grp, Otsu, Shiga 5200292, Japan;

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