Preparation of conductive PET fibers by alkali treatment and polypyrrole deposition

PPy/PET conductive fibers were prepared by conducting alkali-treatment before pyrrole liquid-phase deposition polymerization.The uniformity of the coatings and bonding strength were investigated by SEM and wear testing,and it was found that the alkali-treatment can improve the uniformity and bonding strength of coatings,and the electrically conduct capability was also improved.Influence of alkali-treatment and polypyrrole deposition on PET fibers′ structure and performance were examined by using DSC,DMA and TG.The experimental results showed that fibers′ crystallinity decreased and Tg increased after the alkali treatment;and PPy/PET fibers has better thermal resistance due to the PPy coatings.At the same time,this research also optimized the process conditions of alkali-treatment of PET fibers.