| 羟基基团对PBO纤维表面性能及界面粘结性能的影响 |
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| 引用本文： | 胡大勇,张涛,金俊弘,杨胜林,李光.羟基基团对PBO纤维表面性能及界面粘结性能的影响[J].复合材料学报,2009,26(3):78-83. |
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| 作者姓名： | 胡大勇 张涛 金俊弘 杨胜林 李光 |
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| 作者单位： | 东华大学,纤维材料改性国家重点实验室,上海,201620 |
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| 基金项目： | 国家自然科学基金，上海市重点学科建设项目 |
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| 摘 要： | 以2，5-二羟基对苯二甲酸(DHTA)为改性单体，采用化学共聚改性的方法，合成了大分子链上含有羟基基团的聚对苯撑苯并二噁唑(PBO)与DHTA 的共聚物(DHPBO)，并通过液晶纺丝技术得到了DHPBO 纤维。利用FTIR、接触角等分析手段对其化学结构和纤维表面性能进行了表征，并通过微脱粘实验和SEM评价了DHPBO纤维与环氧树脂基体的界面剪切强度。结果表明：50 mol%DHTA的加入使水在PBO纤维表面的接触角由71.4° 减小到50.7°，乙醇在PBO纤维表面的接触角由37.2° 减小到27.4°；当DHTA含量为20 mol%时，DHPBO纤维的表面自由能增加到43.96 mJ/m2，比PBO纤维提高了23.83%。当 DHTA含量为10 mol%时，DHPBO纤维与环氧树脂的界面剪切强度为18. 87 MPa，比PBO纤维与环氧树脂的界面剪切强度提高了92.55%。
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| 关 键 词： | 羟基基团 DHPBO纤维 接触角 表面性能 界面剪切强度 |
| 收稿时间： | 2008-06-30 |
| 修稿时间： | 2008-11-07 |
Effect of hydroxyl polar groups on the surface and the interfacial adhesion properties of PBO fiber |
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| HU Dayong,ZHANG Tao,JIN Junhong,YANG Shenglin,LI Guang.Effect of hydroxyl polar groups on the surface and the interfacial adhesion properties of PBO fiber[J].Acta Materiae Compositae Sinica,2009,26(3):78-83. |
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| Authors: | HU Dayong ZHANG Tao JIN Junhong YANG Shenglin LI Guang |
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| Affiliation: | (State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China) |
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| Abstract: | The modified poly(p-phenylene benzoxazole)(PBO) containing polar hydroxyl groups in macromolecular chains was obtained by copolymerization from 1,3-diamino-4,6-dihydroxybenzenedihydroch1oride(DAR) and terephthalic acid(TPA)in poly(phosphoric acid)(PPA)solvent,with addition of certain amounts of 2,5-dihydroxyterephthalic acid(DHTA) to replace TPA.The obtained DHPBO-PPA dope was directly spun into fibers via a dry-jet wet-spinning process.The resultant polymers were characterized mainly by means of FTIR,dynam... |
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| Keywords: | hydroxyl polar groups DHPBO fiber contact angle surface property interfacial shear strength ( IFSS) |
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