Utilizing Differential Scanning Calorimetry (DSC) for material analysis is a widely employed technique, and in this specific application, Chip-DSC was employed to measure PP (polypropylene) granules. Distinct batches could be differentiated based on their melting enthalpy and behavior.

Polypropylene (PP), a common thermoplastic polymer, is composed of the monomer propylene and belongs to the group of polyolefins. Its properties closely resemble those of polyethylene, but it tends to be slightly harder and more heat-resistant (TM_PE ~ 100 °C – 130 °C; TM_PP ~ 150 °C – 170 °C).

PP is frequently used in applications such as labeling, packaging, and piping systems. Characterizing PP is often done through its melting point, with the onset point varying by approximately 10 K among different manufacturers.