Dielectric relaxation strength and magnitude of dipole moment of poly(vinyl pyrrolidone)in polar solutions

Dielectric relaxation caused by the segmental motion of poly(vinyl pyrrolidone) (PVP) was observed in solutions at 25°C with various solvents, that is, chloroform, water, and mono- and dihydroxyl alcohols with dielectric constants ranging between 5 and 78. The relaxation strength of the segmental mo...

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Bibliographic Details
Published in:Journal of molecular liquids 2013-05, Vol.181, p.110-114
Main Authors: Shinyashiki, Naoki, Miyara, Masahiko, Nakano, Shinya, Yamamoto, Wataru, Ueshima, Masahiro, Imoto, Daizo, Sasaki, Kaito, Kita, Rio, Yagihara, Shin
Format: Article
Language:English
Subjects:
Dielectric constant
Dielectric relaxation strength
Dipole moment
Polar solvent
Poly(vinyl pyrrolidone)
Polymer solution
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Summary:Dielectric relaxation caused by the segmental motion of poly(vinyl pyrrolidone) (PVP) was observed in solutions at 25°C with various solvents, that is, chloroform, water, and mono- and dihydroxyl alcohols with dielectric constants ranging between 5 and 78. The relaxation strength of the segmental motion of PVP varies with the solvent. The magnitudes of the effective dipole moment of the repeat unit of PVP in solutions with various solvents calculated using the Onsager equation depends simply on the dielectric constant of the solvent at higher frequency. •Dielectric relaxation of polymer in solution was observed in 21 kinds of solvents.•The dielectric constants of solvents are ranging between 5 and 78.•The magnitudes of the dipole moment of a repeat unit of polymer were obtained.•The magnitudes are determined simply by the dielectric constant of the solvents.
ISSN:0167-7322
1873-3166
DOI:10.1016/j.molliq.2013.02.020