A rigid-rod dihydroxy poly(p

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• 作者：Tao Zhang ; Junhong Jin ; Shenglin Yang ; Guang Li ; Jianming Jiang
• 关键词：Poly(p-phenylene benzobisoxazole) fiber ; Hydroxyl groups ; Composite materials ; Elastic loop test ; Compressive strength
• 刊名：Carbohydrate Polymers
• 出版年：2009
• 出版时间：5 September 2009
• 年：2009
• 卷：78
• 期：2
• 页码：364-366
• 全文大小：278 K

文摘

A series of dihydroxy poly(p-phenylene benzobisoxazole) (DHPBO) were prepared by introducing binary hydroxyl groups, that is 2,5-dihydroxyterephthalic acid (DHTA) into poly(p-phenylene benzoxazole) (PBO) macromolecular chains and then DHPBO fibers were prepared by dry-jet wet-spinning method. As indicated by Fourier transform infrared spectrum (FTIR), hydroxyl groups were incorporated into DHPBO polymer chains successfully and intermolecular hydrogen-bonds had been formed. The effects of hydroxyl groups on the compressive property of PBO fibers were investigated by elastic loop test method. The test results showed that the compressive strength of DHPBO fibers with 10 mol % DHTA content were obviously higher than that of PBO fibers.