Article Dans Une Revue Polymer Degradation and Stability Année : 2024

Synthesis of novel reactive flame retardant to improve fire resistance and mechanical properties in epoxy resin

Résumé

A novel reactive flame-retardant (FR), phosphorus-modified tetraethylenepentamine (TEPA-m-MVP), was prepared via aza-Michael addition process, using dimethyl vinylphosphonate (MVP). TEPA-m-MVP was successfully covalently introduced into the structure of the epoxy system, into the epoxy resin matrix synthesised from tetraethylenepentamine (TEPA) and diglycidyl ether bisphenol A (DGEBA) reaction, leading to the development of a flame-retardant epoxy resin (FR-EP). The curing behaviour, mechanical properties, thermal stability and flame-retardant behaviour of FR-EP samples were investigated and compared to the behaviour of the neat epoxy resin (EP). FR-EPs showed an increase in glass transition temperature (Tg), from 120 to 147 °C upon integrating TEPA-m-MVP into the epoxy resin structure, while the value of the E modulus remained unaffected. Furthermore, FR-EP-2%P sample with the optimal P content, approximately 2 wt%, displayed excellent flame-retardant properties. In comparison to EP, total heat release (THR) and peak heat release rate (pHRR) for FR-EP-2%P decreased from 22.6 to 15.3 kJ.g−1 and from 1557 to 572 kW.m−2, respectively. In addition, an interesting impact of the crosslinking density of FR-EP samples on the fire behaviour was observed. This work presents a new strategy for the simultaneous modification of the flame retardancy and mechanical properties of epoxy systems.

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Dates et versions

hal-04667079 , version 1 (19-08-2024)

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Antoine Ishak, Claire Longuet, Belkacem Otazaghine, Rodolphe Sonnier. Synthesis of novel reactive flame retardant to improve fire resistance and mechanical properties in epoxy resin. Polymer Degradation and Stability, 2024, 228, pp.110925. ⟨10.1016/j.polymdegradstab.2024.110925⟩. ⟨hal-04667079⟩
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