PBO纤维紫外老化行为研究  

Study on Ultraviolet Photolysis of PBO Fiber

作　　者：雷兵航 王斌[1,2] 李辉[1] 马琪[1] 

机构地区：[1]西南石油大学材料科学与工程学院,成都610500 [2]高技术有机纤维四川省重点实验室,成都610500

出　　处：《材料导报》2016年第18期80-83,共4页Materials Reports

基　　金：高技术有机纤维四川省重点实验室开放课题基金;油气田重点实验室开放基金(23X151515KCL31)

摘　　要：研究了聚对苯撑苯并二噁唑(PBO)纤维在313nm波段的紫外光辐照下结构与性能的变化。采用红外光谱(FTIR)、扫描电子显微镜(SEM)、X射线能谱(EDS)、单丝拉伸测试、X射线衍射(XRD)对老化前后PBO纤维的形貌和结构进行了表征。结果表明:紫外光对PBO纤维的形貌和结构有显著的影响,紫外老化200h后,表层已经明显出现了剥离现象,紫外老化1000h后,PBO纤维表面脱落严重,纤维内部化学键发生断裂,红外谱图上显示有酯羰基出现,结晶度降低,纤维拉伸强度迅速下降,纤维强力保持率仅约为17%。In this paper, we study the relationship of the structure and properties of poly（p-phenylene bezobisoxazole） （PBO） fiber under ultraviolet（UV） irradiation of 313 nm. The morphology and structure of PBO fiber was characterized by infrared spectra （FTIR）, scanning electron microscopy （SEM）, X-ray energy spectrum （EDS）, tensile test and X-ray diffraction （XRD）. The results show that PBO fiber is very sensitive to the ultraviolet light; the surface of the fiber has peeled obviously exposed to UV irradiation for 200 h. After 1000 h UV aging, the surface and structure of PBO fiber are damaged seriously; ester carbonyl group has been found through the infrared spectra. Furthermore, the crystallinity and tensile strength of the fiber decrease rapidly and the strength retention rate of PBO fiber only remains about 17% after 1000 h aging.

关 键 词：聚对苯撑苯并二噁唑(PBO)纤维 紫外老化 表面结构 力学性能 

分 类 号：TQ342.73[化学工程—化纤工业]