Polycarbonate (PC) /graphene nanocomposite was prepared using multilayer graphene (MLG) with loadings of 0.5, 1, and 3 wt% via melt mixing process. Morphological, structural, and thermal properties of the PC/MLG nanocomposites are investigated to look into the influence of MLG on the nanocomposite. A significant increase (∼6.4°C) in glass transition temperature is observed upon the addition of 3 wt% of MLG into the polycarbonate matrix. This increase in glass transition temperature may be due to the interaction between the MLG and polycarbonate polymer matrix. The specific heat capacity of pure PC and PC/MLG nanocomposites varies linearly with temperature below their glass transition. Upon the addition of MLGs, the overall thermal stability of PC/MLG nanocomposites increases with MLG loadings. A maximum increase about 29.23°C in T _onset of thermal decomposition is observed in PC/MLG nanocomposite having 3 wt% of MLG loading. The activation energy (E_a) of thermal decomposition is also calculated by kinetic analysis of thermal decomposition of the PC/MLG nanocomposites using Horowitz–Metzger and Broido’s methods.

聚碳酸酯（PC）/石墨烯纳米复合材料是使用多层石墨烯（MLG）通过熔融混合工艺制备的，其负载量为0.5、1和3 wt％。研究了PC / MLG纳米复合材料的形态，结构和热性能，以研究MLG对纳米复合材料的影响。向聚碳酸酯基体中添加3 wt％的MLG后，观察到玻璃化转变温度显着提高（约6.4°C）。玻璃化转变温度的这种升高可能是由于MLG和聚碳酸酯聚合物基体之间的相互作用。纯PC和PC / MLG纳米复合材料的比热容随温度低于其玻璃化转变温度而线性变化。加入MLG后，PC / MLG纳米复合材料的整体热稳定性会随MLG负载的增加而增加。最高增加约29.23°CŤ _发病的热分解在具有MLG装载的3％（重量）PC / MLG纳米复合材料观察到。还使用Horowitz-Metzger和Broido方法通过对PC / MLG纳米复合材料进行热分解的动力学分析来计算热分解的活化能（E _a）。