The effective parameters inthe cone calorimetry test to give self-extinguishing properties were discussed by comparing the resultsof the burning tests. It was presumed that the most important parameters for self-extinguishing of WPCswas an average heat release rate at initial stage of burning. The effect offire retardants on the mechanicalproperties of WPCs was also investigated. The tensile strength and modulus of the composites decreasedwith the addition offire retardants.
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