| BPDA/PPD/OTOL聚酰亚胺纤维的力学性能、形貌和结构 |
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| 引用本文： | 黄森彪,马晓野,郭海泉,邱雪鹏,高连勋.BPDA/PPD/OTOL聚酰亚胺纤维的力学性能、形貌和结构[J].应用化学,2012,29(8):863-867. |
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| 作者姓名： | 黄森彪 马晓野 郭海泉 邱雪鹏 高连勋 |
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| 作者单位： | (1.中国科学院长春应用化学研究所高分子物理与化学国家重点实验室 长春 130022；;
2.中国科学院研究生院 北京 100039) |
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| 摘 要： | 在3,3’,4,4’-联苯四酸二酐(BPDA)和对苯二胺(PPD)体系中引入3,3’-二甲基联苯胺(OTOL),显著改善了纤维的力学性能。当n(PPD)∶n(OTOL)=70∶30时,纤维的拉伸强度可达到改性前的2倍,其拉伸强度和拉伸模量分别为1.50和80 GPa。SEM照片显示了纤维的断面为圆形且没有孔穴,也没有明显的"皮芯"结构和原纤结构。WAXD和SAXS分析表明,纤维的轴向堆积和分子链取向在热牵伸过程中得到改善。
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| 关 键 词： | 聚酰亚胺纤维 二甲基联苯胺 扫描电子显微镜 X射线广角衍射 X射线小角散射 |
| 收稿时间： | 2011-09-02 |
Mechanical Property,Morphology and Structure of BPDA/PPD/OTOL Polyimide Fibers |
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| HUANG Senbiaoa,b,MA Xiaoyea,GUO Haiquana,QIU Xuepenga,GAO Lianxun.Mechanical Property,Morphology and Structure of BPDA/PPD/OTOL Polyimide Fibers[J].Chinese Journal of Applied Chemistry,2012,29(8):863-867. |
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| Authors: | HUANG Senbiaoa b MA Xiaoyea GUO Haiquana QIU Xuepenga GAO Lianxun |
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| Institution: | (1.State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of ;
Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China;
2.Graduate School of Chinese Academy of Sciences,Beijing 100039,China) |
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| Abstract: | After incorporating o-tolidine(OTOL) into 3,3′,4,4′-biphenyltetracarboxylic dianhydride(BPDA) and p-phenylenediamine(PPD) backbone,the mechanical properties of fibers were dramatically improved.The strength and modulus of BPDA/PPD/OTOL polyimide(PI) fiber(diamine molar ratio of n(PPD)∶n(OTOL)=70∶ 30) attained 1.50 and 80 GPa,respectively,which were two times of the tenacity of BPDA/PPD PI fibers.SEM pictures showed that the cross-sections of the fibers at each stage were circular and voids free,and also no obvious "skin-core" and microfibrillar structure and wide/small angle X-ray scattering(WAXD/SAXS) experiments indicated that the longitudinal stacks and the molecular orientation of PI fiber were improved in the heat-drawn process. |
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| Keywords: | polyimide fiber o-tolidine SEM wide angle X-ray diffraction small angle X-ray scattering |
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