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PBO纤维界面改性研究 总被引:1,自引:1,他引:0
介绍了聚对苯撑苯并双噁唑(PBO)单体的盐酸盐合成及其优缺点;阐述了PBO的对苯二甲酸法、对苯二甲酞氯法、三甲基硅烷基化法、五氧化二磷调节法及预聚合法的合成方法及其优缺点;简述了PBO的纺丝方法。分析了PBO纤维的物理化学性能,对其各项性能做了比较;论述了PBO纤维界面改性界面理论及改性处理方法。指出PBO纤维的综合性能优异,应加大PBO规模的生产方法和界面改性研究,实现PBO纤维的规模化生产。 相似文献
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戚 《精细化工原料及中间体》2006,(1):35-36
聚对苯撑苯并双恶唑(PB O)是一种高性能的芳杂环聚合物,PBO纤维广泛应用于国防、航空航天高耐热材料等领域。PBO纤维是迄今为止耐热性最高的有机纤维,其分解温度高达650℃,可在300℃下长期使用。接触火焰时不收缩,移去火焰后基本无残焰,碳化长度小于5nm,特别是在750℃燃烧时,产 相似文献
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针对研究较少的聚对苯撑苯并双恶唑(PBO)纤维热处理工艺进行研究,通过控制热处理气氛、热处理温度、热处理停留时间和预加应力4个参数,对初纺丝PBO(PBO–AS)纤维的热处理工艺进行优化,得到拉伸性能大幅提高的PBO–HM纤维。利用电子织物强力仪对PBO–HM纤维的拉伸性能进行测试,发现热处理氛围为N2时PBO–HM纤维的性能更为优异;热处理温度控制在550℃以下时,热处理温度越高,热处理后得到的PBO–HM纤维的拉伸弹性模量越高,但热处理停留时间延长会使拉伸强度降低;预加应力有助于PBO–HM纤维拉伸弹性模量的增加。经分析得出,最优热处理温度为550℃,热处理停留时间为53.3 s,预加应力为5.48 c N/dtex,得到的PBO–HM的拉伸性能较优。 相似文献
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采用低温等离子体技术处理聚对苯撑苯并双噁唑(PBO)纤维,并设计正交实验和剥离实验,通过测试改性前后PBO纤维与聚四氟乙烯(PTFE)膜之间的剥离强力和剥离功来反映粘结牢度,并验证了改性后PBO纤维粘着性的改善。研究发现:在实验条件下,改性后的PBO纤维与聚四氟乙烯膜之间的剥离强力和剥离功最大可提高58.7%和52.7%,粘结牢度增强,粘着性改善;并通过扫描电镜也观察到改性后PBO纤维粗糙程度增加,同时预测了表面粗糙程度与粘着性有一定的联系。 相似文献
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Zhenfen Li Fei Lu Shanshan Lu He Liu Boyuan An Yanhong Wang Yudong Huang Zhen Hu 《应用聚合物科学杂志》2020,137(9):48432
The poly(p-phenylene benzobisoxazole) (PBO) fiber with excellent performance is vulnerable to the irradiation of UV light, which significantly limits their application in advanced composites. Therefore, finding feasible and efficient ways to improve the uvioresistant properties of PBO fiber is of significance. In this work, a facile one-pot method is developed for continuously preparing the PBO/poly(2,5-dihydroxy-1, 4-phenylpyridimidazole) (PIPD) copolymer fiber to greatly enhance the anti-UV properties of PBO fibers. The experimental results demonstrate that the fabricated PBO/PIPD copolymer fiber (molar ratio of 7:1) with greatly improved surface wetting properties (the maximum increase can reach about 179%) possesses satisfactory and desired uvioresistant performance, which is 30.8% higher than that of pure PBO fibers after 480 h UV aging irradiation. The fabricated PBO/PIPD copolymer fiber with improved UV stability has the potential to be applied to many important application areas even in a severe and harsh environment. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137, 48432. 相似文献
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聚苯撑吡啶并咪唑纤维研究(二) 总被引:1,自引:1,他引:0
肖长发 《高科技纤维与应用》2004,29(3):1-5
聚(2,5-二羟基-1,4-苯撑吡啶并二咪唑){Poly[2,6-diimidazo(4,5-b:4’,5’-e)pyridinylene-1,4(2,5-dihydroxy)phenylen],PIPD}纤维(简称M5)是荷兰Akzo Nobel Central Research经过10多a努力研制成功的一种新型刚性聚苯撑吡啶并咪唑(Polypyridobisimidazole)系聚合物纤维,其力学性能突出,耐热性及耐燃性好,由于大分子之间具有独特的氢键网状结构,纤维的抗压缩性能优于其它有机高性能纤维,目前该纤维由荷兰Magellan Systems International,LLC开发生产.本文对PIPD纤维的制备、纤维结构与性能以及应用等进行介绍和讨论. 相似文献
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《塑料、橡胶和复合材料》2013,42(5):199-205
AbstractThe deformation behaviour of the new high performance polymer fibres, poly(p-phenylene benzobisoxazole) (PBO) and polypyridobisimidazole (PIPD) and their adhesion to an epoxy composite matrix have been investigated. Both fibres give well defined Raman spectra, and the deformation micromechanics of PBO and PIPD single fibres and composites were studied from stress induced Raman band shifts. Single fibre stress-strain curves were determined in both tension and compression, thus providing an estimate of the compressive strength of these fibres. It was found that the PIPD fibre has a higher compressive strength (~1 GPa) than PBO (~0·3 GPa) and other high performance polymer fibres, because hydrogen bond formation is possible between PIPD molecules. It has been shown that when PBO and PIPD fibres are incorporated into an epoxy resin matrix, the resulting composites show very different interfacial failure mechanisms. The fibre strain distribution in the PBO-epoxy composites follows that predicted by the full bonding, shear lag model at low matrix strains, but deviations occur at higher matrix strains due to debonding at the fibre/matrix interface. For PIPD-epoxy composites, however, no debonding was observed before fibre fragmentation, indicating better adhesion than for PBO as a result of reactive groups on the PIPD fibre surface. 相似文献
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本文对具有21世纪超级纤维之称的PBO纤维与目前在先进复合材料中广泛使用的T-700碳纤维性能进行了比较。实验数据表明,PBO纤维在高性能纤维中强度最高。但PBO纤维复合材料层间剪切强度低于芳纶纤维复合材料,这是由于PBO纤维未经表面处理,纤维表面的活性低而且较光滑所致。 相似文献
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PBO纤维基本力学性能试验研究 总被引:1,自引:0,他引:1
针对PBO纤维的基本力学性能开展了试验研究。使用湿法缠绕工艺制备了PBO(AS)纤维束纱和PBO(HM)纤维束纱,制备了PBO纤维NOL环,测试上述两种PBO纤维束纱的拉伸性能,同时测试了PBO纤维NOL环层间剪切性能;在缠绕过程当中,PBO纤维工艺性好,适于湿法缠绕工艺使用。测试结果表明,PBO纤维的基本力学性能与报道值接近,其束纱拉伸强度高,层间剪切性能较低,说明PBO纤维表面活性差,改善PBO纤维的表面状态及其与树脂基体之间的界面相容性的研究工作将是PBO纤维复合材料以后研究的重点方向。 相似文献
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聚对苯撑苯并二恶唑(PBO)纤维表面化学惰性较强,应用方面受到了较大的限制。PBO纤维经表面改性后可与其它化合物形成复合材料,如PBO树脂基增强复合材料以及PBO纤维纳米复合材料等,PBO纤维复合材料凭借优异的力学及化学性能在各领域都获得了较大的应用及发展。介绍了PBO树脂基增强复合材料和PBO纤维纳米复合材料的应用及发展。近些年,PBO纤维复合材料已经逐步取代传统的金属材料。但是目前PBO纤维复合材料仍有较大的研究空间,其开发对于航空、航天和国防等高新技术领域材料及产品更新换代具有重要意义。 相似文献
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This paper traces the historical development of high temperature resistant rigid‐rod polymers. Synthesis, fiber processing, structure, properties, and applications of poly(p‐phenylene benzobisoxazole) (PBO) fibers have been discussed. After nearly 20 years of development in the United States and Japan, PBO fiber was commercialized with the trade name Zylon® in 1998. Properties of this fiber have been compared with the properties of poly(ethylene terephthalate) (PET), thermotropic polyester (Vectran®), extended chain polyethylene (Spectra®), p‐aramid (Kevlar®), m‐aramid (Nomex®), aramid copolymer (Technora®), polyimide (PBI), steel, and the experimental high compressive strength rigid‐rod polymeric fiber (PIPD, M5). PBO is currently the highest tensile modulus, highest tensile strength, and most thermally stable commercial polymeric fiber. However, PBO has low axial compressive strength and poor resistance to ultraviolet and visible radiation. The fiber also looses tensile strength in hot and humid environment. In the coming decades, further improvements in tensile strength (10–20 GPa range), compressive strength, and radiation resistance are expected in polymeric fibers. Incorporation of carbon nanotubes is expected to result in the development of next generation high performance polymeric fibers. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 100: 791–802, 2006 相似文献
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Kevlar、PBO有机纤维及其复合材料的性能 总被引:5,自引:0,他引:5
简述Kevlar纤维和PBO纤维的合成、结构、优异性能及应用前景。实验表明:在同等强度下,PBO纤维/环氧复合材料在高性能纤维复合材料中减重效果最好。 相似文献