A comparative study of the mechanism of action of ammonium polyphosphate and expandable graphite in polyurethane

摘要

The present work is dedicated to the development of a new method, which enables a better understanding of the intumescence process. Many studies have investigated char formation form a chemical aspect but the foaming and strength of the char have not been well studied before. Thermal scanning measurements using a rheometer as a fire reactorenable a correlation between the fire behaviour ad thermal behaviour and the visco-elastic properties of the material. This study investigates the rheological modifi- cations of polyurethane thermoset coatings with or without fire-retardant.