Morphology of polyimide fibers derived from 3,3′,4,4′-biphenyltetracarboxylic dianhydride and 4,4′-oxydianiline

Authors

  • Qing-Hua Zhang,

    Corresponding author
    1. State Key Laboratory of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 200051, People's Republic of China
    • State Key Laboratory of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 200051, People's Republic of China
    Search for more papers by this author
  • Mian Dai,

    1. State Key Laboratory of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 200051, People's Republic of China
    Search for more papers by this author
  • Meng-Xian Ding,

    1. State Key Laboratory of Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academic Science, Changchun 130022, People's Republic of China
    Search for more papers by this author
  • Da-Jun Chen,

    1. State Key Laboratory of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 200051, People's Republic of China
    Search for more papers by this author
  • Lian-Xun Gao

    1. State Key Laboratory of Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academic Science, Changchun 130022, People's Republic of China
    Search for more papers by this author

Abstract

As one member of high performance fibers, aromatic polyimide fibers possess many advantages, such as high strength, high modulus, high and low temperature resistance, and radiation resistance. However, the preparation of the high performance fibers is so difficult that the commercial fibers have not been produced except P84 with good flame retardancy. In this report, a polyimide was synthesized from 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA) and 4,4′-oxydianiline (ODA) and the fibers were prepared from its solution by a dry-jet wet-spinning process. The formation of the as-spun fibers in different coagulation bath composition was discussed. Scanning electron microscope (SEM) was employed to study the morphology of the as-spun fibers. As a result, the remnant solvent existed in the as-spun fibers generated from coagulation bath of alcohol and water. There were many fibrils and microvoids with the dimension of tens of nanometers in the fibers. One could observe the obvious fibrillation and the drawn fibers. The measurement for the mechanical properties of the fibers with a drawing ratio of 5.5 indicated that tensile strength and initial modulus were 2.4 and 114 GPa, respectively. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 669–675, 2004

Ancillary