Heat-resistant polybenzoxazole nanofibers made by electrospinning
Heat-resistant polybenzoxazole nanofibers made by electrospinning
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静电纺丝法制备耐热聚苯并恶唑纳米纤维
DOI：
10.1016/j.eurpolymj.2013.10.029
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发表时间：
2014-01-01
影响因子：
6
通讯作者：
Hou, Haoqing
中科院分区：
文献类型：
--
作者：
Zhang, Hean;Jiang, Shaohua;Hou, Haoqing
以3，3 '，4，4'-联苯四甲酸二酐（BPDA）、3，3 '-二羟基联苯胺（DHB）和含羟基聚酰胺酸（OH-PM）为原料，采用低温缩聚法制备PBO前驱体，然后采用静电纺丝法制备出OH-PAA溶液，最后采用热转化法制备出PBO静电纺丝带。用红外光谱和核磁共振氢谱对聚合物的结构进行了表征。热重分析表明，在N2气氛中，5%的重量损失温度非常高，高达643 ℃。CMT-8102机电万能试验机测试结果表明，PBO胶带具有优良的力学性能，拉伸强度为525 MPa，杨氏模量为8.2 GPa。热机械分析（TMA）和动态力学分析（DMA）表明，PBO胶带在350 ℃、N2气氛下加热时，拉伸强度和储能模量保持率均在80%以上，具有优异的热机械性能。皇冠版权所有（C）2013由爱思唯尔有限公司出版。保留所有权利。
Polybenzoxazole (PBO) electrospun nanofiber belts were successfully prepared in three steps, low-temperature polycondensation to synthesize precursor of PBO with 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA) and 3,3'-dihydroxybenzidine (DHB), hydroxy-containing polyamic acid (OH-PM), electrospinning OH-PAA solution to obtain nanofiber belts and thermal conversion to get PBO nanofiber belts. The structures of polymers were characterized by FT-IR and H-1 NMR. The thermogravimetric analysis showed that 5% weight loss temperature was very high up to 643 degrees C in N-2 atmosphere. CMT-8102 Electromechanical Universal Testing results indicated that PBO nanofiber belts possessed excellent mechanical properties with tensile strength of 525 MPa and Young's modulus of 8.2 GPa. Further more, an excellent thermal mechanical properties tested by thermomechanical analysis (TMA) and dynamic mechanical analysis (DMA) showed that both the retention of tensile strength and storage modulus of PBO nanofiber belts were above 80% when the samples were heated at 350 degrees C in N-2 atmosphere. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.