Polyetherimide (PEI)/Polycarbonate (PC) blends were prepared and their thermal behaviour was evaluated in the perspective of an improved processability, thus favouring the use as feeding material for a Fusion Deposition Modelling (FDM) 3D printing machine. PEI/PC blends obtained with a batch mixer were characterized by the means of Thermogravimetric (TG) and Differential Thermogravimetric (DTG) analysis and Differential Scanning Calorimetry (DSC). The parameters associated with the physical properties of the various blends were evaluated and compared with those obtained for the pristine polymers. Both thermal and spectroscopic analyses showed the formation of an immiscible blend, with some possible regions of partial miscibility, furthermore the glass transition temperature (T_g) values demonstrated that the presence of PC in the blend allowed an important lowering of the viscosity, thus meaning an improved processability. Finally, the TGA and DSC results were compared with those obtained for Ultem 9085 that is the standard PEI grade for FDM printing in advanced applications developed by Stratasys, Ltd.

制备了聚醚酰亚胺（PEI）/聚碳酸酯（PC）混合物，并从改进的可加工性的角度评估了它们的热性能，因此有利于用作熔融沉积建模（FDM）3D打印机的进料。用热重法（TG）和差示热重法（DTG）分析和差示扫描量热法（DSC）表征用间歇式混合器获得的PEI / PC共混物。评估了与各种共混物的物理性能相关的参数，并将其与原始聚合物的参数进行了比较。热分析和光谱分析均显示形成了不混溶的共混物，具有部分可能的部分混溶区域，此外还有玻璃化转变温度（T _g）值表明，共混物中PC的存在可显着降低粘度，从而改善加工性能。最后，将TGA和DSC结果与由Stratasys，Ltd.开发的高级应用程序中Ultem 9085（FDM打印的标准PEI等级）获得的结果进行比较。