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Superior comprehensive performance of a rigid-rod poly(hydroxy-p-phenylenebenzobisoxazole) fiber
Polymer ( IF 4.6 ) Pub Date : 2018-07-05 , DOI: 10.1016/j.polymer.2018.07.001
Jianting Zhang , Ningren Jin , Jianrong Gao

The novel poly(hydroxy-p-phenylenebenzobisoxazole) (HPBO) was synthesized by different polymerization routes, including hydroxy-orderly distributed polymer (ord-HPBO) and hydroxy-randomly distributed polymer (ran-HPBO). Surface elemental composition, thermal stability, intrinsic viscosity, UV resistance, surface morphology, mechanical and interfacial properties of HPBO fiber were investigated. ATR-FTIR and EDS spectrums identify the formation of mono-hydroxyl modified polymer. Excellent thermal stability (up to 600 °C), mechanical properties (tensile strength of 4.32 GPa, modulus of 169.7 GPa) and rheological spinnability of ran-HPBO-AS via HD self-polymerization route were obtained. Meanwhile, the SEM after UV irradiation indicated that the photostability of HPBO is better than PBO. The interfacial shear strength (IFSS) between HPBO-AS fiber and epoxy resin is 21.7 MPa, 87.1% higher than that of PBO-AS fiber. Comparing different HPBO synthesis routes, the self-polymerization of HD salt route is believed to be a feasible route for industrial production and the ran-HPBO is expected to become a new generation of high-performance fiber.



中文翻译:

硬棒聚(羟基对苯撑苯并双恶唑)纤维的优异综合性能

通过不同的聚合途径合成了新型的聚羟基对苯撑苯并二恶唑(HPBO),包括羟基有序分布的聚合物(ord -HPBO)和羟基无规分布的聚合物(ran)。-HPBO)。研究了HPBO纤维的表面元素组成,热稳定性,特性粘度,抗紫外线性,表面形态,机械和界面性能。ATR-FTIR和EDS光谱确定了单羟基改性聚合物的形成。通过HD自聚路线获得了ran-HPBO-AS优异的热稳定性(高达600°C),机械性能(抗张强度为4.32 GPa,模量为169.7 GPa)和流变可纺性。同时,紫外线照射后的SEM表明HPBO的光稳定性优于PBO。HPBO-AS纤维与环氧树脂之间的界面剪切强度(IFSS)为21.7 MPa,比PBO-AS纤维高87.1%。比较不同的HPBO合成路线,

更新日期:2018-07-05
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