期刊
POLYMER DEGRADATION AND STABILITY
卷 75, 期 2, 页码 255-258出版社
ELSEVIER SCI LTD
DOI: 10.1016/S0141-3910(01)00226-9
关键词
polypyrrole; degradation; stability; kinetics
The kinetics of the electrochemical degradation of polypyrrole has been investigated in aqueous solutions, containing HNO3 or NaNO3. For HNO3 solution, it has been found that the first-order degradation rate constant (k) is ca: 10(-5) s(-1) within the electrode potential limits of 0.3 to 0.6 V vs. Ag/AgCl. Over 0.6 V, a steep increase of k with increasing electrode potential was found, reaching ca. 9.8 V-1 for logk. For NaNO3 solutions, the k value ranges from 2.8(.)10(-5) to 3.4(.)10(-3) s(-1) within the electrode potential limits of 0.3 to 0.9 V, and a linear slope of logk vs. E of 5.1 V-1 was found within the E limits of 0.4 to 0.9 V. (C) 2002 Elsevier Science Ltd. All rights reserved.
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