Microstructural analysis and blowing agent concentration in aged polyurethane and polyisocyanurate foams

• Published in: Applied thermal engineering Vol. 164; p. 114440
• Main Authors: Berardi, Umberto, Madzarevic, Jelena
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 05.01.2020; Elsevier BV
• Subjects: Blowing agent; Blowing agents; Condensates; Elongation; Environmental protection; Escape structures; Foam insulation; Gas chromatography; Heat conductivity; Heat transfer; Microstructural analysis; Microstructure; Organic chemistry; Plastic foam; Polyisocyanurates; Polyurethane; Polyurethane foam; Polyurethane foams; Scanning electron microscopy; Thermal conductivity; Thermal engineering; Wall thickness; Blowing agent; Scanning electron microscopy; Gas chromatography; Polyisocyanurates; Foam insulation; Polyurethane foams

•Foams age causing a deterioration of thermal and mechanical properties with time.•Blowing agents used in polyisocyanurate foams tend to leave the material matrix.•SEM allowed to analyse the changes of the cell microstructure after accelerated aging.•SEM showed differences in cell aspect ratio and c...