Research on the fire retardancy and smoke suppression of soft PVC

The properties and fire-retardant mechanism of some kinds of fire retardants,such as aluminum hydroxide,magnesium hydroxide,antimony,phosphorus,boron and molybdenum,were introduced.The fire retardancy and smoke suppression of soft PVC were tested.The results showed that:(1)the mechanical property of coupling agent-treated fire retardant was improved since the interfacial combination between the fire retardant and matrix was enhanced;(2)the using amount of molybdenum trioxide had no significant influences on the fire-retardant effect,but the fire-retardant effect could become better and better with the increase of the using amount of zinc borate and antimony trioxide.