Study of the thermal properties of mixtures of polypropylene with aliphatic polyamide

The characteristics of isotactic polypropylene (PP), aliphatic polyamide (PA) and their blends were studied. The properties of the obtained composites were studied by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The temperatures and enthalpies of melting and crystallization of the obtained PP/PA composites were measured. The thermal stability of PP, PA and their mixtures was studied at high temperatures in nitrogen atmosphere. It is shown that, with the addition of PA, a shift in the temperature range of thermal degradation of PP to higher temperatures is observed. The temperature at which the half-transformation of the mixtures is achieved also increases. At the same time, the DTG curves of blends show that the maximum rates of decomposition of PP and PA decrease with an increase in the PA content.