Flame retardant based on metal catalyzed instantaneous crosslinking to form carbon for improving the safety performance of aircraft epoxy resin

With the continuous occurrence of aircraft fire events, aircraft composites have received strong attention as they are considered to require excellent fire safety properties. To develop domestically fire safety technology for aircraft epoxy resin (EP), this work synthesized a metal-catalyzed transient cross-linking carbon-forming flame retardant (TcZrA). TcZrA enabled EPs to achieve good fire safety properties. The test results showed that the addition of TcZrA at 5 wt% can lead to an LOI of 29.8 % for the EP composite and a V-0 rating in UL-94. In the CCT test, the PHRR and THR of TcZrA/EP-5 decreased by 62.9 % and 42.3 %, respectively, compared with pure EP. The release of smoke and toxic gases were also reduced. 5 wt% flame retardant can reduce the TSR and TSP of EP composites by 19 % and 18.6 %. Additionally, TcZrA/EP can give EP good impact and deformation resistance, which was reflected in the improvement of glass transition temperature and impact strength. The results of the fire mechanism study showed that TcZrA catalytically promotes the cross-linking structure to start cross-linking into carbon, thus playing a shielding role in the condensed phase, and the generation of a large number of phosphorus-containing compounds can also be in the gas phase to terminate the combustion process. This technology is expected to promote the localization of EP flame retardant technology for aircraft.

• Record URL:
  • https://doi.org/10.1016/j.ssci.2024.106627
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S0925753524002170
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09257535
• Supplemental Notes:
  • © 2024 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. Abstract reprinted with permission of Elsevier.
• Authors:
  • Zheng, Penglun
  • Zhao, Haihan
  • Li, Junwei
  • Wu, Fuyi
  • Liu, Quanyi
• Publication Date: 2024-10

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 106627
• Serial:
  • Safety Science
  • Volume: 178
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0925-7535
  • Serial URL: http://www.sciencedirect.com/science/journal/09257535

Subject/Index Terms

• TRT Terms: Aircraft; Aviation safety; Epoxy resins; Fire resistant materials; Fire retardants; Toxicity
• Subject Areas: Aviation; Materials; Safety and Human Factors;

Filing Info

• Accession Number: 01927811
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 22 2024 3:09PM