Abstract
The stability of iodine-doped polyacetylene in aqueous environments and the particular effect of variations in pH upon the stability of the intrinsically conducting polymer has been investigated in a variety of aqueous environments. Stability performance was established by simultaneously monitoring the four-probe electrical conductivity and the steady-state electrode rest potential during exposure of the metallically doped, [CHI0.18-0.20]x. polymer over an approximate 10-day period. Initial polymer conductivities were in all cases between 100 and 300 S cm-1. The initially measured electrode potential was in all cases ca. 0.45 V vs SCE irrespective of the doping levels studied; y = 0.007, 0.168, 0.210 or the pH of the test solution in the range 1-9. The rate and extent of degradation in these material properties was found to increase at the extremes of pH. Alkaline conditions were found to be generally more aggressive to the p-doped polymer compared to acidic conditions. The normally slow but ever present degradation of iodine-doped polyacetylene which occurs even under inert atmosphere conditions is accelerated in all aqueous environments leading to an often precipitous degradation of electrically based material properties.
Original language | English (US) |
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Pages (from-to) | 3192-3196 |
Number of pages | 5 |
Journal | Journal of Physical Chemistry |
Volume | 94 |
Issue number | 7 |
DOIs | |
State | Published - Jan 1 1990 |
ASJC Scopus subject areas
- Engineering(all)
- Physical and Theoretical Chemistry