Dielectric relaxation processes in supercooled polyhydric alcohols and their mixtures

• Published in: Journal of non-crystalline solids Vol. 352; no. 42-49; pp. 4742 - 4745
• Main Authors: Minoguchi, Ayumi, Kaneko, Toshiya, Sotokawa, Hajime, Nozaki, Ryusuke
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 15.11.2006; Elsevier
• Subjects: Applied sciences; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Dielectric loss and relaxation; Dielectric properties; Dielectric properties of solids and liquids; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Equations of state, phase equilibria, and phase transitions; Exact sciences and technology; Glass transition; Glass transitions; Organic polymers; Physicochemistry of polymers; Physics; Properties and characterization; Relaxation, electric modulus; Specific phase transitions; Structure, morphology and analysis; Relaxation, electric modulus; Glass transition; 77.22.Gm; 61.25.Em; 64.70.Pf; Dielectric properties; Alcohol polymer; Supercooled liquids; electric modulus; Glass transition; Molecular dynamics method; Arrhenius equation; 61.25.Em; 64.70.Pf; 77.22.Gm; Dielectric properties; Relaxation; Complex permittivity; Dielectric relaxation
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2006.04.026

In order to study the α and the Johari–Goldstein β relaxation processes in polyhydric alcohols, the broadband complex permittivity measurements were performed on supercooled polyhydric alcohols, mixtures of polyhydric alcohols (the molar ratio is 1:1) and water-in-polyhydric alcohols. According to the Arrhenius diagram for all the samples, the loci of the relaxation frequency of the α process systematically change with carbon number of polyhydric alcohols. However, the loci for the β process show the similar behavior. These difference and similarity must be helpful to understand the molecular dynamics of supercooled polyhydric alcohols.