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Experimental investigation of the humidity induced change in the conduction mechanism of PEG

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Abstract

Characterization of the electrical properties of covalently linked polyethylene glycol thin films under a changing relative humidity is examined by dc measurements. At low humidity levels, electronic conduction takes place while the absorbed water contributes to this mechanism and increases the current. At around 70% relative humidity, as a result of the water clusters formed, the polymer melts from the semicrystalline form and the current shows a steeper increase. The water vapor condenses and conduction takes an ionic nature. There is a hysteresis between the absorption and desorption of water as the film cannot reach its semicrystalline form in the time interval of desorption. The polymer film could attain its pre-absorption form after annealing.

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Authors and Affiliations

  1. Physics Department, Bogazici University, Istanbul, 34342, Turkey

    O. Erdamar, Y. Skarlatos, G. Aktas & M.N. Inci

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  1. O. Erdamar
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  2. Y. Skarlatos
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  3. G. Aktas
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  4. M.N. Inci
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Correspondence to O. Erdamar.

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PACS

72.60.+g; 72.80.Le

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Erdamar, O., Skarlatos, Y., Aktas, G. et al. Experimental investigation of the humidity induced change in the conduction mechanism of PEG. Appl. Phys. A 83, 159–162 (2006). https://doi.org/10.1007/s00339-005-3481-0

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  • DOI: https://doi.org/10.1007/s00339-005-3481-0

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