期刊
COMPOSITES PART B-ENGINEERING
卷 222, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2021.109043
关键词
Flame retardants (FRs); Hyperbranched polysiloxane; Epoxy resin; Fire hazards
资金
- National Natural Science Foundation of China [21875188]
- Key Research and Development Program of Shaanxi [2019ZDLGY04-08]
- Open Fund of Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregate, Guangzho, China (South China University of Technology) [2019B030301003]
- Natural Science Basic Research Plan in Shaanxi Province of China [2019JQ-34]
The synthesis of a novel non-aromatic hyperbranched flame retardant containing Si, P, N has been proposed for epoxy resin to improve fire safety and reduce smoke production. The modified epoxy showed enhanced mechanical properties, lower curing temperature, and significant reductions in heat release, smoke production, and fire growth rate, making it ideal for applications where fire safety is a concern.
Plastic combustion has adverse impacts on air quality and human health. In this work, a novel non-aromatic Si, P, N-containing hyperbranched flame retardant (HPNSi) was synthesized and proposed to epoxy resin. The modified epoxy exhibits not only reduced fire hazards and less smoke production in favor of eco-friendly, but also remarkable mechanical properties and lower curing temperature for facile processability. With 6 wt% incorporation, the peak heat release and total smoke production were reduced by 29.6% and 20.7%, respectively, and the time to ignition (TTI) increased as well as the fire growth rate (FIGRA) dropped off, which is of vital significance for saving lives in a fire. Meanwhile, the impact strength and flexural strength greatly enhanced by 72.9% and 22.0%, while its curing temperature was lower than that of controlled EP system. Interestingly, we also found that the solid carbon particles on the char surface apparently reduced from SEM image. The blending of its unique non-aromatic hyperbranched structure containing Si, P, N with epoxy architecture was responsible for the desirable integrated enhancement. The broad possibilities in the field of flame-retardant plastic with reduced fire hazards and excellent integrated performance enable the novel hyperbranched flame retardant a bright future for application.
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