Article Dans Une Revue Polymer Degradation and Stability Année : 2025

POSS in intumescent flame-retardant systems to improve fire behaviour of virgin and recycled high density polyethylene

Marie Combeau
Marcos Batistella
Perrin Didier
J. Lopez-Cuesta

Résumé

This study aims to compare the properties of two recycled and a virgin High-Density Polyethylene (HDPE), flame retarded with intumescent formulations based on Ammonium Polyphosphate (APP), Polyamide 6 (PA6), and Polyhedral Oligomeric Silsesquioxane (POSS). The microstructure and mechanical properties of the blends were studied using scanning electron microscopy (SEM) and tensile tests. Cone calorimetry was used for flammability assessment at different irradiances. Thermal degradation was investigated using Pyrolysis Combustion Flow Calorimetry (PCFC) and Thermogravimetric analysis (TGA). X-ray diffraction (XRD) and SEM were used to characterize the cone calorimeter residues. It was shown that the addition of the intumescent flame retardant system (IFR) led to an improvement in terms of fire behaviour with a higher decrease on pHRR and an increase on the amount of residue for recycled HDPE. The addition of POSS nanoparticles improved fire performance by creating more cohesive and expanded residues, especially in formulations with recycled HDPE from milk bottles. Recycled HDPE formulations exhibited comparable or even slightly better mechanical properties than virgin HDPE. The best combination of mechanical and fire performance was achieved with 1wt% of POSS in both virgin and recycled formulations. However, adding more than 2wt% of POSS negatively impacted tensile properties and fire behaviour, due to the inability to disperse POSS agglomerates.

Domaines

Matériaux
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Avant la publication
vendredi 4 juillet 2025
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vendredi 4 juillet 2025
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Dates et versions

hal-04893068 , version 1 (17-01-2025)

Identifiants

Citer

Marie Combeau, Marcos Batistella, Antoine Breuillac, Mari Naess, Perrin Didier, et al.. POSS in intumescent flame-retardant systems to improve fire behaviour of virgin and recycled high density polyethylene. Polymer Degradation and Stability, 2025, 233, pp.111177. ⟨10.1016/j.polymdegradstab.2025.111177⟩. ⟨hal-04893068⟩
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