【摘 要】
：
Poly(p-phenylene benzobisoxazole)(PBO) is a candidate of high performance materials for many applications. PBO materials properties are considered to be closely
【机 构】
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Department of Applied Chemistry,Department of Chemistry,Harbin University of Commerce
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Poly(p-phenylene benzobisoxazole)(PBO) is a candidate of high performance materials for many applications. PBO materials properties are considered to be closely related to their fabrication process, especially coagulation. In this paper, the coagulation effect on the chemical and microstructure of PBO was investigated with the help of a PBO model compound, 2, 2-(1,4-phenylene) bis(5-amino-6-benzoxazolole). During coagulation, the hetero-cyclic ring of the PBO structure was experienced cleavage and even being broken down completely under some extreme conditions. Wide-angle X-ray diffraction (WAXD) analysis showed that different coagulants could cause the microstructure difference in PBO materials. In a slow coagulation process, PBO molecular chains aligned more orderly in the side-by-side direction (200).
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