The synergistic effects of aluminum oxide (Al 2 O 3 ) 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 Al 2 O 3 can act as flame-retardant synergistic additive in EVA/LDH composites, and 2 phr Al 2 O 3 can raise UL rating from V-1 to V-0 at 120 phr loadings of additives. The CCT data indicated that the addition of Al 2 O 3 in EVA/LDH system can greatly reduce the heat release rate, mass loss rate, and the production rate of carbon monoxide.
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Jiao et al. (2009) studied this question.
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