Effect of electrothermopolarization on thermal properties of compositions based on polypropylene and MnO2

Abstract

Information about the internal structure can also be obtained by studying the thermal properties of composites with low molecular weight additives in the low and high temperature range.In this work, by studying the thermophysical properties of PP-based MnO2 composites after exposure to an electric field, we will look at how the additive changes the properties and determine the processes of thermal degradation after aging. Differential thermal analysis (DTA) or thermospectroscopy method is based on measuring the thermal effect when heating or cooling the test substance depending on the temperature. This method makes it possible to quantify the temperature of various transitions with high accuracy. Also that polymer and polymer composite aging relate to the high local anisotropy of force field due to sharp difference of intramolecular and intermolecular interaction forces. By derivatographic method polypropylene films (PP) exposed to electrothermoplarization filled by MnO2 to the extent of 0.5 and 1vol.% have been investigated. By electrothermoplarization E=7×106V/m as a result of aging PP matrix crystals part amorphism is taken place and thermal stability. It is established that electric intensity leads as to the complete amorphism of PP+0.5vol.%MnO2 composition so the complete depolymerization followed by volatilization of formed intermediate products to the extent of 100%.