Smoke-suppressant and flame-retardant rigid polyurethane foam obtained via processing based on saccharomycetes fungus and ammonium molybdate

Abstract

Abstract The present work proposes an environmentally friendly, simple, and efficient way to impart smoke suppression and flame retardancy to rigid polyurethane foam (RPUF) by soaking the pristine RPUF for short periods in the saccharomycetes fungus (SF) solution and then in the ammonium molybdate (AM) solution. The co-addition of SF and AM exhibit good performance on smoke suppression and flame retardant. The level of flammability, thermal degradation behavior, and combustion properties of the samples are evaluated mainly via vertical burning tests, thermogravimetric analysis, and calorimetry, respectively. The proportions of 16SF/3AM/RPUF are varied to maximize the performance of the processed RPUF samples in terms of both smoke suppression and flame retardancy, which are substantially increased by the optimal sample compared to those of pristine RPUF.