Effects of hydrophilicity of rigid-rod polymers on the formation of poly-p-pyridylenebenzobisoxazole fibers

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• 作者：Tooru Kitagawa ; Nobuyuki Taniguchi ; Yukihiro Abe
• 刊名：Journal of Materials Science
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：52
• 期：7
• 页码：4142-4154
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Materials Science, general; Characterization and Evaluation of Materials; Polymer Sciences; Continuum Mechanics and Mechanics of Materials; Crystallography and Scattering Methods; Classical Mechanics;
• 出版者：Springer US
• ISSN：1573-4803
• 卷排序：52

文摘

This study investigates the fiber structure of a newly developed poly-p-pyridylenebenzobisoxazole fiber. The molecular structure resembles that of poly-p-phenylenebenzobisoxazole fiber, which has a rigid-rod backbone structure with a thin-planar shape; thus, a similar preferential radial orientation of the molecular planes normal to the fiber axis is expected. We have focused on the change of fiber structures induced by copolymerizing hydrophilic groups in a rigid-rod backbone of PBO. The preferential orientation of the crystal planes in various positions of the fiber, the molecular orientation along the fiber axis and the crystal size were analyzed by micro-focus X-ray diffraction. The difference in molecular orientation and crystal size in the various positions was related to the formation of the crystal structure induced by radial preferential orientation of the (200) crystal plane sourced from the rigid-rod backbone structure with the thin-planar shape.