Using polyamide-6 as charring agent in intumescent polypropylene formulations I. Effect of he compatibilising agent on the fire retardancy performance

摘要

Addition of the ammonium polyphosphate/polyamide-6 blend is known to enable fire properties of interest to be obtained in many polymes. However, the use of an interfacial agent is required to stabilise the formation. This study investigates the improvement of the fire performance induced by incorporation of ethylene-butyl acrylate-maleic anhydride (EBuAMA) and eth- ylene vinyl acetate(EVA_x, where x is the vinyl acetate weight level) as interfacial agents of the polypropylene/ammoniumpoly- phosphate/polyamide-6 blend. It is shown that the improvement strongly depends upon both the nature and the amount of interfacial agent used.