Electrical properties of poly(bis(β-phenoxyethoxy)phosphazene) and its complexes

Abstract

Electrical and dielectrical properties of poly(bis(β-phenoxyethoxy)phosphazene) (I) and its complexes with various content ratios of AgSO₃CF₃ to monomeric unit (0.25/1 (II) and 0.5/1 (III) in molar ratio) were investigated.Dc conductivity of respective samples at 18 °C were 6.1×10⁻¹², 4.4×10⁻⁹, and 7.1×10⁻⁸ S/m.Dc conduction was considered to be due to ion hopping. Charge mobility ranged from 3×10⁻¹² to 6× 10⁻¹¹ m²/Vs depending on the applied field in sample II. In sample I, a tanδ peak was found which can be ascribed to molecular relaxation of main chains. The peak vanished upon introducing AgSO₃ CF₃. Temperature dependence of total conductivity (σ _T ) measured byac method in the temperature range between −150 °C and 50 °C showed several peaks at the temperatures corresponding to the peak temperatures of tanδ. Total conductivities of respective samples at 100 kHz were 4.9×10⁻⁷ (69 °C), 1.7×10⁻⁴ (45 °C), and 1.5×10⁻⁴(40°C)S/m.