A rigid-rod dihydroxy poly( p-phenylene benzobisoxazole) fiber with improved compressive strength

• Published in: Carbohydrate polymers Vol. 78; no. 2; pp. 364 - 366
• Main Authors: Zhang, Tao, Jin, Junhong, Yang, Shenglin, Li, Guang, Jiang, Jianming
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 05.09.2009; Elsevier
• Subjects: Applied sciences; chemical structure; Composite materials; compressibility; Compressive strength; Elastic loop test; Exact sciences and technology; Hydroxyl groups; Organic polymers; Physicochemistry of polymers; Poly( p-phenylene benzobisoxazole) fiber; polymers; Polymers with particular properties; Preparation, kinetics, thermodynamics, mechanism and catalysts; strength (mechanics); synthetic fibers; tensile strength; testing; Compressive strength; Composite materials; Elastic loop test; Hydroxyl groups; Poly( p-phenylene benzobisoxazole) fiber; Solution polycondensation; Synthetic fiber; Mechanical properties; Experimental study; Functional polymer; Wet spinning; Hydroquinone derivatives; Cyclopolymer; Preparation; Poly(p-phenylene benzobisoxazole) fiber; Copolycondensation; Aromatic copolymer; Benzoxazole derivative copolymer; Rigid chain
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2009.03.043

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.