Preparation and Properties of Zeolite/Brucite/Polypropylene Composite Fire Retardant Materials–cobalt

Abstract

In this paper, polypropylene (PP) as main material, magnesium hydroxide as flame retardant, effects of flame retardant synergist cobalt zeolite on flame retardant PP composite flame retardant properties, mechanical properties and thermal degradation behavior. The results show that, the reaction time is 3h, the reaction temperature is 400 ℃ , the loading is 7%,the flame-retardant properties of PP composites were improved obviously, the horizontal burning rate is 20.6mm/min, the limiting oxygen index reached 22.6%; little effect on the mechanical properties, tensile strength is up to 22.1MPa, the impact strength is 4.25KJ/m2; introducing cobalt zeolite change the thermal degradation process of magnesium hydroxide / PP system, decrease the thermal decomposition rate of PP composite, improve the thermal stability of the composites at high temperature.