Paper Information

Journal:   IRANIAN POLYMER JOURNAL (ENGLISH)   2004 , Volume 13 , Number 6; Page(s) 463 To 470.
 
Paper: 

EFFECT OF SOLUTION TEMPERATURE ON ELECTROACTIVITY OF POLYPYRROLE USING CYCLIC VOLTAMMETRY TECHNIQUE

 
 
Author(s):  ANSARI KHALKHALI R.*, WALLACE G.G.
 
* Chemistry Department, Faculty of Science, Guilan University, Rasht I.R. Iran
 
Abstract: 

Many applications of polypyrrole conducting polymers based on their interesting and unique electroactivity properties (e.g., sensors) may demand possessing high thermal stability in solutions. So, thermal stability of electroactivity of polypyrrole conducting electroactive polymers (CEP) is very important. In this research, in order to investigate the thermal stability of the electroactivity in solutions, a series of polypyrrole (PPy) films doped with different dopants coated on glassy carbon electrodes were prepared electrochemically. Electroactivity stability of polymers in different solution temperatures was then investigated using cyclic voltammetry(CV) technique. It was found that the electroactivity of the PPy is strongly dependent on the kind of the counterion. PPy/PTS was found to be more thermally stable in aqueous solution than other inorganic ions such as chlorides. Chemically, electrochemically stable as well as large size counterions (dopants) show higher stability at elevated solution temperatures. The nature of counterion, the preparation conditions (physical, chemical and electrochemical) and the nature of supporting electrolytes in which the polymer is switched, not only affect electroactivity of PPy films but also affect the thermal stability of these polymers in aqueous solutions

 
Keyword(s): CONDUCTING POLYMERS, POLYPYRROLE, SOLUTION TEMPERATURE, THERMAL STABILITY, ELECTROACTIVITY AND CYCLIC VOLTAMMETRY
 
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