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

Abstract

The presentwork proposes an environmentally friendly, simple, and efficientway to impart smoke suppression and flame retardancy to rigid polyurethane foam(RPUF) by soaking the pristineRPUFfor short periods in the saccharomycetes fungus (SF) solution and then in the ammoniummolybdate (AM) solution.The co-addition of SF andAMexhibit good performance on smoke suppression and flame retardant. The level of flammability, thermal degradation behavior, and combustion properties of the samples are evaluatedmainly via vertical burning tests, thermogravimetric analysis, and calorimetry, respectively.The proportions of 16SF/3AM/RPUFare varied tomaximize the performance of the processedRPUF samples in terms of both smoke suppression and flame retardancy,which are substantially increased by the optimal sample compared to those of pristineRPUF.