Thermal and electrical characterization of poly(propylene terephthalate)

The thermal and electrical properties of poly(propylene terephthalate) samples with different carboxyl terminal groups content are investigated. The thermal behavior is studied through the rate of crystallization. As regards the electrical properties, dc conductivity and low-frequency relaxation processes are studied as a function of temperature. A transition in the electrical behavior is detected and related to the glass transition of the polymer.