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Oxidative chemical polymerization of pyrrole

Calorimetric and kinetic measurements

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Abstract

A reaction calorimeter has been used to determine at three different temperatures the enthalpy values for the polymerization of pyrrole dissolved in acetonitrile, by using FeCl3 as the oxidative agent. From the calorimetric data it has been found that the reaction is first-order with respect to the pyrrole. The rate constants at the same temperatures have also been determined. By using the Arrhenius equation we have obtained the activation energy for the formation of this electroconducting polymer.

Zusammenfassung

Mittels eines Reaktionskalorimeters wurden bei drei verschiedenen Temperaturen die Enthalpiewerte der Polymerisation von in Acetonitril gelöstem Pyrrol, unter der Anwendung von FeCl3 als Oxidationsmittel bestimmt. Aus den kalorimetrischen Daten ergibt sich, daß es sich bezogen auf Pyrrol um eine Reaktion erster Ordnung handelt. Bei den gleichen Temperaturen wurden auch die Geschwindigkeitskonstanten bestimmt. Unter Anwendung der Arrhenius'schen Gleichung haben wir auch die Aktivierungsenergie der Bildung dieses elektronenleitenden Polymers ermittelt.

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Financial support from the italian National Research Council (CNR) is gratefully acknowledged.

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Cavallaro, S., Colligiani, A. & Cum, G. Oxidative chemical polymerization of pyrrole. Journal of Thermal Analysis 38, 2649–2655 (1992). https://doi.org/10.1007/BF01979741

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  • DOI: https://doi.org/10.1007/BF01979741

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