ACS Sustainable Chemistry & Engineering, Год журнала: 2024, Номер 13(1), С. 611 - 620

Опубликована: Дек. 23, 2024

Traditional flame retardants, often derived from petrochemical sources, pose significant environmental and health concerns due to their potential toxicity persistence in the environment. In this study, a biobased hyperbranched polymer retardant named QB was synthesized using quercetin phenylphosphoryl dichloride by one-step method. The copolymer characterized via Fourier transform infrared spectroscopy, thermogravimetric analysis, gel permeation chromatography, revealing its high thermal stability polymeric nature, with weight-average molecular weight of 78 299 g/mol. subsequently incorporated into bisphenol A-type epoxy resins 4–4 diamino diphenylmethane as curing agent prepare flame-retardant composite. With additions only 1 wt % QB, EQB-1 achieved UL 94 V-0 rating vertical burning test an impressive limiting oxygen index (LOI) value 28.2%. Moreover, addition 3 EP resulted maximum reduction 32.9% peak heat release rate 37.4% smoke produce rate, indicating outstanding suppression properties, which are attributed mainly condensed-phase mechanism. Furthermore, impact flexural strength composite were maintained slight improvement observed. findings research expected contribute development environmentally friendly systems that meet industry standards while promoting use renewable materials. This work supports sustainability replacing retardants quercetin-based materials, reducing impact.

Язык: Английский