A New Perspective on Hydrogen Chloride Scavenging at High Temperatures for Reducing the Smoke Acidity of PVC Cables in Fires, IV: The Impact of Acid Scavengers at High Temperatures on Flame Retardance and Smoke Emission

In PVC compounds, hydrogen chloride plays a fundamental role in ·H and ·OH radical trapping, lowering the flame energy during combustion. Furthermore, it yields actual Lewis acids promoting cross-linking of polyene sequences from degradation bringing char layer, protecting items flames. Therefore, is inherently flame-retarded. However, plasticized requires retardants smoke suppressants to enhance fire performance. Low-smoke acidity compounds have been developed reduce HCl emission combustion and, therefore, smoke. They contain potent acid scavengers capable acting at high temperatures. react with condensed phase, making unavailable gas even compromising reaction enhancing produced The effect sequestration for cables by studied this paper through measurements oxygen index, heat release, production. It noteworthy that strongly affect parameters such as growth rate cone calorimetry, specific (total) capacity, fuel gases micro calorimetry. some formulations, index below values formulations without double their rate. fact, they neutralize action antimony trioxide precursors commonly used items, them prone ignite, release smoke, spread flame. A new generation needed keep together low-smoke performance items.