Processing conditions and their effect on homogeneity of PPVC structural characteristics

The processing conditions involved in rolling and extrusion methods and their effect on the thermal behavior of plasticised PVC (PPVC) were studied in this article. Limiting oxygen index test (L.O.I) and differential scanning calorimetry (DSC), fourier transform infrared spectroscopy (FTIR), and scanning electron microscope (SEM) has been used to evaluate the structure and properties of extruded and rolled PPVC. The SEM and FTIR tests proved there was a significant structural difference found between extruded and rolled PPVC samples, such as the ratios of the elements carbon, hydrogen, and oxygen were different in the samples of both methods, which affected by the L.O.I test and differences in active groups obtained by FTIR analyses