What does this research mean for the field?

Combining 8% ammonium polyphosphate (APP) and 47% magnesium-aluminum-layered double hydroxide (MgAl-LDH) in ethylene-vinyl acetate (EVA) composites significantly enhances flame retardancy and elongation by forming a dense char layer. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To investigate the combined flame retardant effects of ammonium polyphosphate and magnesium-aluminum-layered double hydroxide in EVA blends.

April 1, 2026Open Access

Cooperative flame retardancy of ammonium polyphosphate and magnesium–aluminum-layered double hydroxide (LDH) in EVA blends

Key Points

To investigate the combined flame retardant effects of ammonium polyphosphate and magnesium-aluminum-layered double hydroxide in EVA blends.
Formulated EVA composites with varying concentrations of ammonium polyphosphate and magnesium-aluminum-LDH.
Tested the flame retardancy and mechanical properties of the composites using UL-94 and LOI methods.
Analyzed the char formation during combustion.
The EVA composite with 8% APP and 47% MgAl-LDH achieved UL-94 V-0 rating.
Composite exhibited a limited oxygen index (LOI) of 29.3%.
Elongation at break increased by 52.8% compared to unmodified EVA.

Abstract

The EVA composite with 8% APP and 47% MgAl-LDH achieved UL-94 V-0, 29.3% LOI, and 52.8% higher elongation. APP formed a dense char layer, enhancing flame retardancy.

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