Polymer Composites Based on Polylactide and Reduced Graphene Oxide

Abstract: Filled composites of polylactide with reduced graphene oxide of various compositions are obtained under conditions of solid-phase mixing under the action of shear deformations. The thermophysical behavior of polylactide in compositions have been studied, and the corresponding temperatures and heats of thermal transitions have been determined. The method of thermogravimetric analysis has shown there is an increase in the thermal stability of the compositions, which increases with a rise in the filler content. Based on the results of differential scanning calorimetry, the effect of reduced graphene oxide on the crystallization of polylactide has been established. The mechanical properties of the compositions are studied, and the effect of the filler content on the change in mechanical characteristics is shown. When studying the electrical properties of the composites, it is found that the direct-current conductivity is zero and does not depend on the filler concentration, which indicates an uneven distribution of the filler in the polymer matrix. © 2023, Pleiades Publishing, Ltd.