Abstract:

Aiming at the problem of the continuous conductive treatment method of yarns prepared by In-situ polymerization on low utilization ratio of raw materils, an improved process was presented to prepare conductive polytrimethylene terephthalate (PTT) / PANI  composite yarns, and the electrical and mechanical properties thereof were studied in detail. The results indecated that high conductivity PTT/PANI composite yarns can be continuously prepared by the improved process. The conductivity of PTT increased first and then decreased, but the conductivity of the composite yarns increased and finally trended to be stable approximately, with the increase of the oxidant APS concentration. The resistance increased exponentially with the stretching of composite yarn in large-strain. And the resistance change is complicated during the small-strain stretch-recovery cycles. The breaking strength and breaking elongation of PTT yarns decreased and the initial modulus increased after the conductive treatment.

Key words: polytrimethylene terephthalate, polyaniline, in-situ polymerization, continuous preparation, electrical conductivity, mechanical property