Фізичні властивості нанокомпозитів ПХТФЕ-ТРГ та ПХТФЕ-ТРГ/SiO2

Abstract

Polymeric nanocomposites based on polychlorotrifluoroethylene (PCTFE) with a low content of dispersed thermally expanded graphite TRG and modified filler TRG/SiO2, characterized by high electrophysical properties, were obtained. The features of the electronic structure of the composite surface have been investigated. The regularities of changes in the electrophysical properties of the composites depending on the content of fillers and temperature have been established. On the basis of studies and comparative analysis of the thermophysical properties (specific heat capacity cp, temperature coefficient of linear expansion a) of the systems, the influence of the structural morphological state of the components and their concentration, the level of interfacial interaction on the physical properties of nanocomposites have been investigated.It has been established that the modified nanofiller is more active towards the polymer matrix than the unmodified one. The composites exhibit a double effect of the modified nanofiller on the matrix structure, which consists in the formation of a powerful crystal structure in the zones of influence of the nanofiller and amorphization of the polymer matrix in the peripheral zones. It has been found that the amorphization of the matrix results in a decrease in the area of temperature reflexes peaks on the temperature dependences of the specific heat capacity and a change in the absolute value of the temperature coefficient of linear expansion with an increase in the concentration of the modified TRG.