高等学校化学学报

高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (4): 952.

• 研究论文 • 上一篇    下一篇

牵伸倍率对联苯型聚酰亚胺纤维形貌、取向及性能的影响

张春玲1,3, 邱雪鹏2, 薛彦虎1, 高连勋1,2, 丁孟贤2, 姬相玲1   

  1. 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,
    2. 高分子复合材料工程中心, 长春 130022;
    3. 吉林大学汽车材料教育部重点实验室, 吉林大学材料科学与工程学院, 长春 130022
  • 收稿日期:2010-08-17 修回日期:2010-10-12 出版日期:2011-04-10 发布日期:2011-03-09
  • 通讯作者: 邱雪鹏, 姬相玲 E-mail:xp_q@ciac.jl.cn;xlji@ciac.jl.cn
  • 基金资助:

    吉林省科技厅项目(批准号: 20086019)资助.

Effect of Draw Ratio on the Morphology, Orientation and Properties of Biphenyl\|type Polyimide Fibers

ZHANG Chun-Ling1,3, QIU Xue-Peng2*, XUE Yan-Hu1, GAO Lian-Xun1,2, DING Meng-Xian2, JI Xiang-Ling1*   

  1. 1. State Key Laboratory of Polymer Physics and Chemistry,
    2. Polymer Composite Engineering Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
    3. Key Laboratory of Automobile Materials of Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130022, China
  • Received:2010-08-17 Revised:2010-10-12 Online:2011-04-10 Published:2011-03-09
  • Contact: QIU Xue-Peng,JI Xiang-Ling E-mail:xp_q@ciac.jl.cn;xlji@ciac.jl.cn
  • Supported by:

    吉林省科技厅项目(批准号: 20086019)资助.

PDF (PC)

被引次数

23

摘要： 摘要：均苯四甲酸二酐（PMDA）和联苯二酐（BPDA）与3,3’-二甲基联苯二胺（OTOL）共聚得到的聚酰亚胺（PI）溶液通过干喷-湿法纺制成纤维。利用扫描电镜（SEM）、广角X-射线衍射（WAXD）成像、纤维力学性能测试仪、动态力学分析仪（DMA）和热失重分析仪（TGA）等表征手段，研究不同牵伸倍率对联苯型聚酰亚胺纤维形貌结构、取向度、力学性能、热性能等方面的影响。PI纤维的表面致密光滑，截面呈现皮-芯状结构，结晶度很低。随着牵伸倍率的增加，PI纤维的直径和纤度变小，取向度增加，力学性能增加。当牵伸倍率达到2.8时，强度和模量分别达到2.95 GPa和100.0 GPa。在氮气环境下联苯型PI纤维失重10%对应的温度在580℃以上，表现出优良的热稳定性。动态力学分析的结果表明，PI纤维在高于室温存在两种松弛，玻璃化转变温度（Tg）在340℃以上，且随牵伸倍率增加有升高的趋势。

关键词: 聚酰亚胺纤维, 形貌, 结晶取向, 力学性能

Abstract: Abstract Novel biphenyl-containing polyimide (PI) solution based on pyromellitic dianhydride (PMDA)/3,3’,4,4’-biphenyl-tetracarboxylic dianhydride (BPDA)/o-tolidine(OTOL) were synthesized via co-polymerization. Its PI fibers are produced through dry-jet wet-spinning technique. These fibers are characterized with field emission scanning electron microscopy (FESEM), wide-angle X-ray diffraction (WAXD), fiber mechanical property tester, dynamic mechanical analyzer (DMA), thermogravimetric analyzer (TGA). Particularly, effects of draw ratio on morphology, orientation, mechanical properties and thermal properties of PI fibers are discussed. PI fibers have smooth surface, relatively uniform diameter, and skin-core structure in cross-section. The diameter and filament of PI fibers decrease and the degree of orientation increases with draw ratio. Crystallinity of these fibers is very low. The tensile strength and tensile modulus of the PI fibers can reach 2.95 GPa and100.0 GPa when draw ratio is 2.8. Generally, 10% weight loss of these PI fibers corresponds to temperatures above 580oC and it indicates that these fibers possess excellent thermal stability under nitrogen atmosphere Two relaxations above room temperature can be found in DMA curves. The glass transition temperature (Tg) of PI fibers is above 340 oC.

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