Abstract
Halogen free fire-retardant silicon rubber compounds were prepared, using red phosphorus combined with magnesium hydroxide as flame retardants. The flame retardant mechanisms of red phosphorus, magnesium hydroxide were studied by means of comprehensive decomposition studies and combustion tests. The study is intended to illuminate prerequisites and the potential of red phosphorus as a fire retardant for silicone rubber in the condensed phase. The flammability was determined by limited oxygen indices （LOI） and UL 94 test. Thermo-oxidative decomposition kinetics were characterized by thermo-gravimetric analysis (TG). The activation energies were determined using the Friedman method, which do not require knowledge of the reaction mechanism (RM). The results show that the MVMQ/MH/RP composite has a higher thermal stability and lower flammability.
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