A Cone Calorimetric Study of Flame Retardance and Smoke Emission of PVC. I. The Effect of Cuprous and Molybdic Oxides*

A wealth of literature in research at molecular levels concern ing the transition metals, e.g., Cu- and Mo-containing compounds, has been intensively documented for flame retardance, particularly smoke suppres sion, of PVC. An attempt has been made in this article aimed at performing a cone calorimetric analysis in air at irradiances of 25, 35, and 50 kWm -2 for ex ploring the effect of Cu 2 O and MoO 3 on the thermal behavior of PVC. Some mechanistic aspects on flame retardance and smoke generation of PVC for mulations have also been described based upon parameters, such as TTI, HRR, EHC, SEA, and TSP, etc., taken from the cone. The comprehensive analysis of MLR, HRR, and SPR as functions of time turns out to be most in formative as stated in the text.