• conducting polymers;
  • fibers;
  • mechanical properties


Polyaniline fibers were prepared with a continuous forming-drawn processing routine that better met practical production requirements. The continuous forming drawing of the fibers was conducted successfully with the following methods. A reducing agent was added to a polymer solution during the dissolution of a polyaniline emeraldine base in N-methyl-2-pyrrolidinone (NMP). After the entire wet-spinning process was finished, the fibers were reoxidized and doped to obtain electric conductivity. The as-spun fibers were predrawn at a low drawing ratio in a warm water bath before a plasticization drawing process on a hot plate. After the fibers were predrawn, some solvent was still kept in the fibers and used as a plasticizer of the fibers so that the plasticization drawing process would be performed successfully. The spinning conditions that affected the mechanical properties and conductivity of the fibers were the content of NMP in the coagulation bath, the coagulation-bath temperature, the warm-water-bath temperature, the predrawing ratio, the hot-plate temperature, the plasticization drawing ratio, and the reoxidation and protonation treatment time. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 956–960, 2004