Reference period for predicting long-term thermal performance of thermal insulating foams

摘要

Replacement of traditional blowing agents, chlorofluorocarbons (CFC), with partial1y halogenated chlorofluorocarbons (HCFC) that have thermal insulating performance inherently lower than that of CFC brought to question their long-term thermal performance (LTTP). As a result of research activities, two predictive techniques, slicing and scaling or slicing and modeling, are now considered for evaluating long-term thermal performance of different foam products: polyisocyanurate, polyurethane, extruded polystyrene, and phenolic (resole) foams. But without defining: What does the "long