DSC of biodegradable plastic composites material

Abstract

The article presents the thermal analysis of new, fully biodegradable thermoplastic composites filled with natural additives. The samples were made of thermoplastic material with the trade name BIOPLAST (R) GS 1289, and the natural filler was powder from walnut shells and chicken egg shells in various mass proportions. Differential scanning calorimetry (DSC) analysis was used to assess the quality of the new materials obtained. Moreover, it allowed to determine and select technological parameters of processing and explain the occurrence of undesirable phenomena related to the processing of these materials. The thermal properties of the obtained samples were determined using a Mettler-Toledo DSC 3 scanning calorimeter by the ISO 11357 standard. The analysis was carried out using the following method: conditioning the sample for 10 min at - 20 degrees C and heating from - 20 to 180 degrees C at a 10 K min-1 speed. Each sample was subjected to three measurements according to the given method, the first and second cycle in a row, and the third cycle was performed after 24 h. The mass melt flow rate (MFR) was also determined. The critical share of filler in the matrix (BIOPLAST (R) GS 1289) and the influence of natural fillers on signals on the curve were determined, and it was related to the processing properties of the developed materials.