Synergistic Flame-retardant Effects of Aluminum Oxide with Layered Double Hydroxides in EVA/LDH Composites

Abstract

The synergistic effects of aluminum oxide (Al₂O₃) with layered double hydroxides (LDH) in ethylene vinyl acetate copolymer/LDH (EVA/LDH) composites have been studied using limiting oxygen index, UL-94 tests, and cone calorimeter test (CCT). The results from the UL-94 tests show that the Al₂O₃ can act as flame-retardant synergistic additive in EVA/LDH composites, and 2 phr Al₂O₃ can raise UL rating from V-1 to V-0 at 120 phr loadings of additives. The CCT data indicated that the addition of Al₂O₃ in EVA/LDH system can greatly reduce the heat release rate, mass loss rate, and the production rate of carbon monoxide.

Keywords

synergistic effect layered double hydroxide halogen-free flame retardant.

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