A P/N-containing flame retardant constructed by phosphaphenanthrene, phosphonate, and triazole and its flame retardant mechanism in reducing fire hazards of epoxy resin
Article
Article Title | A P/N-containing flame retardant constructed by phosphaphenanthrene, phosphonate, and triazole and its flame retardant mechanism in reducing fire hazards of epoxy resin |
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ERA Journal ID | 1671 |
Article Category | Article |
Authors | Cheng, Jianwen, Duan, Huajun, Yang, Shuang, Wang, Jun, Zhang, Qianqian, Ding, Guoping, Hu, Yefa and Huo, Siqi |
Journal Title | Journal of Applied Polymer Science |
Journal Citation | 137 (37) |
Article Number | e49090 |
Number of Pages | 11 |
Year | 2020 |
Publisher | John Wiley & Sons |
Place of Publication | United States |
ISSN | 0021-8995 |
1097-4628 | |
Digital Object Identifier (DOI) | https://doi.org/10.1002/app.49090 |
Web Address (URL) | https://onlinelibrary.wiley.com/doi/10.1002/app.49090 |
Abstract | A P/N-containing flame retardant (PPT) constructed by phosphaphenanthrene, phosphonate, and triazole groups was successfully synthesized and used as a reactive co-curing agent for epoxy resin (EP). The curing behavior, thermal property, combustion behavior, and flame retardant mechanism of EP thermosets were comprehensively investigated. According to the analysis of DSC and TGA, PPT accelerated the crosslinking reaction and enhanced the charring ability for EP thermosets at high temperature. The results of combustion test indicated that PPT endowed epoxy thermoset with outstanding flame retardancy. When the phosphorus content was 0.71 wt%, EP/DDS/PPT-2 achieved a LOI value of 33.2% and passed V-0 rating in UL-94 test, and its peak heat release rate and total heat release were decreased by 63.7 and 30.5%, respectively, relative to EP/DDS. Moreover, the FIGRA of EP/DDS/PPT-2 was reduced from 9.7 to 3.5 kW m−2 s−1, manifesting the significantly improved fire safety of EP thermoset. The flame retardant mechanism was summarized as two parts: (a) the barrier effect of continuous phosphorus-rich char layers in condensed phase, (b) the quenching effect of phosphorous radicals and diluting effect of nonflammable gases in gaseous phase. |
Keywords | DOPO; epoxy resin; flame retardant; phosphonate; triazole |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 401609. Polymers and plastics |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Wuhan University of Technology, China |
Centre for Future Materials |
https://research.usq.edu.au/item/yyxy7/a-p-n-containing-flame-retardant-constructed-by-phosphaphenanthrene-phosphonate-and-triazole-and-its-flame-retardant-mechanism-in-reducing-fire-hazards-of-epoxy-resin
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