Calculation of the activation volume in semi-conducting polypyrrole

► We investigate the negative sign of the activation volume υact. ► We investigate the fact that υact becomes more negative as the temperature is increased. ► The derived value of the activation volume is comparable to the value predicted from a thermodynamical model. ► Gibbs energy does not depend...

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Bibliographic Details
Published in:Synthetic metals 2012-01, Vol.161 (23-24), p.2732-2733
Main Authors: Sakellis, I., Papathanassiou, A.N., Grammatikakis, J.
Format: Article
Language:English
Subjects:
Activation
Activation energy
Activation volume
Amorphous solids
Applied sciences
Electrical, magnetic and optical properties
Exact sciences and technology
Expansion
Mathematical models
Organic polymers
Physicochemistry of polymers
Point defects
Polypyrroles
Properties and characterization
Semiconductors
Synthetic metals
Thermodynamic properties
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Summary:► We investigate the negative sign of the activation volume υact. ► We investigate the fact that υact becomes more negative as the temperature is increased. ► The derived value of the activation volume is comparable to the value predicted from a thermodynamical model. ► Gibbs energy does not depend on the defect mechanism while it is only determined from the bulk material. We show that the recent experimentally derived value of the activation volume in semi-conducting polypyrrole is comparable to the value predicted from a thermodynamical model (Varotsos, 1976 [7]; Varotsos et al., 1978 [5]), which interconnects the activation Gibbs energy with the bulk elastic and expansivity data.
ISSN:0379-6779
1879-3290
DOI:10.1016/j.synthmet.2011.10.010