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Preparation of an integrated P–N–Si tube containing phosphazene-triazine-silica structure: An efficient flame retardant agent for epoxy resin

To reduce the fire risk of EP, an amino-silica functionalized triazine-rich polyphosphazene tube (MTP@NH2–SiO2) was designed and prepared. With low addition of MTP@NH2–SiO2 (0.5 wt% and 1.5 wt%), the peak value of heat release rate (PHRR) of EP/MTP@NH2–SiO20.5 and EP/MTP@NH2–SiO21.5 decreases by 55....

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Bibliographic Details
Published in:Composites communications 2023-02, Vol.38, p.101504, Article 101504
Main Authors: Zhou, Xia, Wang, Jun, He, Lingxin, Qiu, Shuilai, Pan, Renming
Format: Article
Language:English
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Summary:To reduce the fire risk of EP, an amino-silica functionalized triazine-rich polyphosphazene tube (MTP@NH2–SiO2) was designed and prepared. With low addition of MTP@NH2–SiO2 (0.5 wt% and 1.5 wt%), the peak value of heat release rate (PHRR) of EP/MTP@NH2–SiO20.5 and EP/MTP@NH2–SiO21.5 decreases by 55.1% and 72.4%, respectively. The total smoke production (TSP) of EP/MTP@NH2–SiO21.5 is of 52.8% reduction. And the fire growth index (FGI) and the fire performance index (FPI) of EP/MTP@NH2–SiO21.5 are 2.74 kW/(m2s) and 0.19 (m2s)/kW, which means EP/MTP@NH2–SiO21.5 is of the lowest fire risk properties. Therefore, the fire safety properties of EP/MTP@NH2–SiO2 can be improved by designed MTP@NH2–SiO2 indeed. MTP@NH2–SiO2 is with high-efficiency of condensed phase flame retardant effect on EP. EP/MTP@NH2–SiO2 can form a glass-like protective char layer rich in phosphorus-nitrogen-silicon (P–N–Si), so as to suppress the transmission of volatile products, oxygen and heat in combustion zone of EP, thus improving the fire safety of EP. [Display omitted] •A novel amino-silica functionalized triazine-rich polyphosphazene tube was firstly synthesized.•The PHRR of EP with only 0.5 wt% MTP@NH2–SiO2 adding was of 55.1% reduction.•MTP@NH2–SiO2 presented excellent condensed phase flame retardant effect on EP.
ISSN:2452-2139
2452-2139
DOI:10.1016/j.coco.2023.101504