The aim of this study is to create a method of determining the optimal mixing parameters of polymer composites obtained with the use of a laboratory mixer “Station-Plasti-Corder”, Brabender. This device is used in the production of homogeneous polymers, elastomeric, ceramic or other blends. It can be used to produce polymer masterbatches for laboratory purposes.

During the preparation of the blends, processes like polymer degradation occur, which is a disadvantageous phenomenon from the point of view of receiving polymer composites. The use of optimal mixing parameters counteracts this process and at the same time ensures a very good distribution of the filler in the polymer matrix.

A series of two-component blends of polylactide with the addition of a constant amount of carbon filler was obtained. The influence of the rotational speed and temperature changes on the stirrer torque was discussed. The structures of the concentrates as well as their physical and thermal properties were also compared. Analysis were performed using scanning electron microscopy, differential scanning calorimetry, infrared spectroscopy and mass flow rate.