Improvement of surface wettability and interfacial adhesion ability of poly(p-phenylene benzobisoxazole) (PBO) fiber by incorporation of 2,5-dihydroxyterephthalic acid (DHTA)
Improvement of surface wettability and interfacial adhesion ability of poly(p-phenylene benzobisoxazole) (PBO) fiber by incorporation of 2,5-dihydroxyterephthalic acid (DHTA)
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通过掺入 2,5-二羟基对苯二甲酸 (DHTA) 改善聚对亚苯基苯并双恶唑 (PBO) 纤维的表面润湿性和界面粘合能力
DOI：
10.1016/j.eurpolymj.2008.10.041
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发表时间：
2009-01-01
影响因子：
6
通讯作者：
Jiang, Jianming
中科院分区：
文献类型：
--
作者：
Zhang, Tao;Hu, Dayong;Jiang, Jianming
将2,5-二羟基对苯二甲酸(DHTA)引入聚对亚苯基苯并恶唑(PBO)大分子链中,合成二羟基聚对亚苯基苯并二恶唑(DHPBO),然后采用干喷湿纺法制备DHPBO纤维。研究了羟基极性基团对PBO纤维表面润湿性和界面粘附能力的影响。通过引入双羟基极性基团，PBO纤维对水的接触角可以从71.4度降低到50.70度，对乙醇的接触角可以从37.2度降低到27.40度。 DHPBO纤维对水的润湿时间可短至650毫秒，是PBO纤维的一半。 DHPBO（10%摩尔含量DHTA）纤维与环氧树脂之间的界面剪切强度（IFSS）为18.87 MPa，比PBO纤维高92.55%。 SEM图像表明PBO/环氧树脂复合材料的失效模式可能从纤维/基体粘合失效转变为部分内聚失效。 (c) 2008 Elsevier Ltd. 保留所有权利。
By introducing 2,5-dihydroxyterephthalic acid (DHTA) into poly(p-phenylene benzoxazole) (PBO) macromolecular chains, dihydroxy poly(p-phenylene benzobisoxazole) (DHPBO) was synthesized and then DHPBO fibers were prepared by dry-jet wet-spinning method. Effects of hydroxyl polar groups on surface wettability and interfacial adhesion ability of PBO fiber were investigated. With the incorporation of double hydroxyl polar groups, contact angle on PBO fiber for water can decrease from 71.4 degrees to 50.70 degrees, and contact angle for ethanol can decrease from 37.2 degrees to 27.40 degrees. The wetting time on DHPBO fibers for water can be as short as 650 ms, which is half of that of PBO fibers. The interfacial shearing strength (IFSS) between DHPBO (10% mol content DHTA) fibers and epoxy resin is 18.87 MPa, 92.55% higher than that of PBO fibers. SEM images indicate that the PBO/epoxy composite failure mode may change from fiber/matrix adhesive failure to partially cohesive failure. (c) 2008 Elsevier Ltd. All rights reserved.