Advanced Industrial and Engineering Polymer Research, Год журнала: 2024, Номер 7(3), С. 326 - 337

Опубликована: Март 30, 2024

The substitutional structure of cyclotriphosphazene derivatives significantly influences their flame-retardant effectiveness. A derivative with triazole group, referred to as hexa(1,2,4-triazol-3-ylamine) (HATA), was utilized improve the flame retardancy epoxy resin (EP). Differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical analysis were employed characterize thermal properties EP/HATA thermosets. HATA facilitated curing EP due its secondary amine structure. thermosets exhibited improved char-forming ability storage modulus, attributed rigid cyclophosphonitrile HATA. As a result incorporating 5% 0.73 wt% phosphorus, passed UL-94 V-0 level. Subsequent using cone calorimeter revealed obvious reductions in peak heat release rate, fire growth total smoke production addition Simultaneously, there significant enhancement char yield during combustion, indicating notable improvements safety. Additional investigations, including X-ray photoelectron spectroscopy, electron microscopy, TG-FTIR, pyrolysis gas chromatography/mass spectrometry, analyze residue gaseous volatiles. promoted formation dense, continuous, intumescent layer containing EP. Moreover, decomposition released quantity nitrogen-containing volatiles, effectively mitigating flammable gases originating from matrix phase. biphasic mode action proposed, underscoring cooperative effects arising interaction between substituents molecular for

Язык: Английский