Dielectric relaxation spectroscopy in poly(ethylene oxide)/water systems | Zendy

Kyritsis Apostolos | Zendy; Pissis Polycarpos | Zendy

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Dielectric relaxation spectroscopy in poly(ethylene oxide)/water systems

Author(s) -

Kyritsis Apostolos,

Pissis Polycarpos

Publication year - 1997

Publication title -

macromolecular symposia

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.257

H-Index - 76

eISSN - 1521-3900

pISSN - 1022-1360

DOI - 10.1002/masy.19971190104

Subject(s) - relaxation (psychology) , dielectric , dielectric spectroscopy , ethylene oxide , materials science , permittivity , water content , chemical physics , dipole , spectroscopy , oxide , analytical chemistry (journal) , atmospheric temperature range , chemical engineering , thermodynamics , chemistry , composite material , organic chemistry , polymer , copolymer , social psychology , quantum mechanics , electrochemistry , physics , geotechnical engineering , optoelectronics , electrode , metallurgy , engineering , psychology

The dielectric properties of poly(ethylene oxide) (PEO) are studied by dielectric relaxation spectroscopy measurements in wide ranges of frequency (5–2×10 9 Hz) and temperature (193 − 300 K). PEO/water systems are also studied in a wide range of water content h (0 − 0.85 grams of water per grams of dry PEO). The measurements allow to distinguish between the dipolar secondary mechanism γ and effects related to free charge motion. The data are analyzed within the formalisms of permittivity, ϵ*, and electric modulus, M*. The water has been found to plasticize the dipolar process and to affect strongly the conduction process. A critical water content h c , h c = 0.13, has been found for the mechanism of charge transport.

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