DSC measures the gelation (fusion) level of PVC resin by analyzing heat flow during thermal scanning. The DSC curve explanation helps interpret the thermal transitions and gelation degree. Gelation reflects the molecular fusion extent critical to pipe mechanical properties.
Optimal gelation levels range from 85% to 95%, correlating with superior long-term strength, ductility, and stiffness. A gelation level of 93% is typically achievable under controlled processing using advanced plastic machinery.