Title :
Dependences of ionic conductivity and dielectric constant of amorphous nonpolar polymers on free volume
Author :
Wang, Min-Sheng ; Weifang, Jin ; Ziyu, Liu
Author_Institution :
Nat. Key Lab. of Electr. Insulation, Xi´´an Jiaotong Univ., Shaanxi, China
Abstract :
For amorphous nonpolar polymers, a quantitative relation between dielectric constant and free volume was extended from the authors´ (1990) previous model for liquids. An expression of ionic conductivity in terms of free volume was developed based on the Nernst-Einstein equation. Furthermore, the correlation between ionic conductivity and dielectric constant was derived. Experimental results on polystyrene agree well with the theoretical models over a wide range of temperature (-180°C to +140°C)
Keywords :
ionic conduction in solids; organic insulating materials; permittivity; polymers; thermodynamic properties; -180 to 140 degC; Nernst-Einstein equation; amorphous nonpolar polymers; dielectric constant; free volume; insulating materials; ionic conductivity; polystyrene; Amorphous materials; Conducting materials; Conductivity; Dielectric constant; Dielectric materials; Dielectrics and electrical insulation; Equations; Polymers; Temperature; Thermal expansion;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1991., Proceedings of the 3rd International Conference on
Conference_Location :
Tokyo
Print_ISBN :
0-87942-568-7
DOI :
10.1109/ICPADM.1991.172221
