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Flame Retardance and Smoke Suppression of CFA/APP/LDHs/EVA Composite

Heilongjiang Key Laboratory of Molecular Design and Preparation of Flame retarded Materials, College of Science, Northeast Forestry University, Harbin 150040, China
Author to whom correspondence should be addressed.
Academic Editor: Stefano Invernizzi
Appl. Sci. 2016, 6(9), 255;
Received: 24 May 2016 / Revised: 29 August 2016 / Accepted: 5 September 2016 / Published: 9 September 2016
(This article belongs to the Section Chemistry)
PDF [2875 KB, uploaded 9 September 2016]


A new intumescent flame-retardants (IFR) system including the charing-foaming agent (CFA), ammonium polyphosphate (APP) and modified-layered double hydroxides (LDHs) with different transition metals (Ni, Co, Cu) were used in the ethylene vinyl acetate (EVA) matrix. Both the limiting oxygen index and the vertical burning tests indicate that the CFA/APP system and LDHs have significant synergistic flame retardant effects. The morphology of combustion residues indicates that the many pores of residues can prevent the melt dripping. The thermal analysis shows that the flame retardants obviously enhanced the thermal degradation temperature of ethylene-based chains of the composites. The cone calorimeter test reveals that the CO2 and combustion residues have an important influence on the reduction of heat release rate (HRR), the smoke production rate (SPR), the production rate and the mean release yield of CO. The composite containing Cu (ELDH-Cu) delivers an 82% reduction in peak heat release rate, while ELDH-Ni has the best CO suppression among all composites. This work not only confirms the flame retardance and smoke suppression of CFA/APP/LDH/EVA, but also provides an effective method for producing new flame retardants and smoke suppressants. View Full-Text
Keywords: composite; layered double hydroxides; flame retardant mechanism; production rate of CO2; mean release yield of CO2 composite; layered double hydroxides; flame retardant mechanism; production rate of CO2; mean release yield of CO2

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Wang, L.; Xu, M.; Shi, B.; Li, B. Flame Retardance and Smoke Suppression of CFA/APP/LDHs/EVA Composite. Appl. Sci. 2016, 6, 255.

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