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 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.