Preparation and characterization of acryl-polyurethane foam composites improved flame retarding properties with various flame retardants
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Flexible polyurethane (PU) foam which has open cell structure, has excellent buffer capacity, mechanical strength and also has good air permeability. But PU foams are highly combustible, and they generally emit unwanted smoke and toxic gases during the burning process because of high rate of heat release. In this study, the impregnation of flame retardant was prepared by dispersing a flame retardant in an acrylic solution using ultrasonication. FPU foam was immersed into the solution using machine designed by our laboratory and then dried using near-infrared (NIR) oven. Some kinds of flame retardants and titanate coupling agents (TCA) were added into PU foam to obtain flexible FPU foam. Flame retarding characteristic was analyzed using the horizontal flame test. Fire safety performance of the FPU composites with various flame retardants in terms of thermal, morphological properties and flammability performance were investigated.