Enhancement of conductivity in polyaniline-[poly(vinylidene chloride)-co-(vinyl acetate)] blends by irradiation

Bodugoz-Senturk H., Guven O.

RADIATION PHYSICS AND CHEMISTRY, vol.80, no.2, pp.153-158, 2011 (SCI-Expanded) identifier identifier


In this study we have prepared conductive poly(aniline), (PANI) blends with poly(vinylidene chloride-co-vinyl acetate), [P(VDC-co-VAc)] copolymer with varying compositions using gamma radiation to induce conductivity. A number of blends with different compositions were prepared by solution casting followed by irradiation in a Co-60 gamma cell to different doses up to 800 kGy. Electrical conductivity of the blends was measured before and after irradiation using a four-probe technique. Increasing radiation dose resulted in an increase of 9 orders of magnitude in the conductivity of P(VDC-co-VAc)/(PANI) films reaching 0.1 S/cm at 500 kGy and beyond this dose a decrease was observed. Effect of film thickness on conductivity of the blends was investigated and a slight increase of an order of magnitude was observed on increasing the film thickness from 50 to 200 mu m. It was also observed that PANI blends exhibited a stretch dependent small increase in conductivity. The conductivity of the irradiated films was found to be stable for up to 12 months under ambient conditions. (C) 2010 Elsevier Ltd. All rights reserved.