▎ 摘　　要

Dynamic mechanical analysis (DMA), thermo-mechanical analysis (TMA) and differential scanning calorimetry (DSC) were used in order to assess the thermal behaviour of polyester composites with graphene oxide and graphite. Heat flow, specific heat, glass transition temperature (Tg) and mass loss were determined on heating and cooling stages, for neat polyester and its composites, depending on filler (graphene oxide/graphite) content. Coefficient of thermal expansion (CTE) and Tg were inferred based on measurement of the specimen thickness versus test temperature, in the range of 30...220 degrees C. Results obtained from DMA, such as storage modulus, were used to estimate mechanical properties and Tg. A comparative analysis was done as regards glass transition temperature determined through three different methods (DSC, TMA and DMA), for polyester composites, on heating and cooling stages, depending on filler content. The careful observation of the test results, revealed that polyester composites exhibit a better thermal behaviour as compared to that of neat polyester.