Correlation Engine 2.0
Clear Search sequence regions

filter terms:
  • amine (1)
  • flame retardants (2)
  • heat (2)
  • layer (1)
  • oxygen (1)
  • p- substances (1)
  • phase (1)
  • resin (15)
  • Sizes of these terms reflect their relevance to your search.

    Simultaneously enhancing the fire safety and mechanical properties of epoxy resin (EP) remains a persistent challenge. Herein, a high-efficient phosphaphenanthrene-based flame retardant (FNP) is synthesized using 3,5-diamino-1,2,4-triazole, 4-formylbenzoic acid, and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide. Due to the presence of active amine groups, FNP is employed as a co-curing agent for fabricating EP composites with outstanding fire safety and mechanical properties. EP containing 8 wt% FNP (EP/8FNP) achieves a vertical burning (UL-94) V-0 rating with a limiting oxygen index of 31%. Meanwhile, FNP declines the peak heat release rate, total heat release, and total smoke release of EP/8FNP by 41.1%, 31.8%, and 16.0%, respectively, compared to those of unmodified EP. The increased fire safety of EP/FNP composites is because FNP promotes the formation of an intumescent, compact, and cross-linking char layer for EP/FNP composites, and releases P-containing substances and noncombustible gases in the gas phase during combustion. In addition, EP/8FNP exhibits 20.3% and 5.4% increase in the flexural strength and modulus compared with those of pure EP. Furthermore, FNP enhances the glass transition temperature of EP/FNP composites from 141.6 °C for pure EP to 147.3 °C for EP/8FNP. Therefore, this work is conducive to the future development of fabricating fire-safe EP composites with enhanced mechanical properties. © 2023 Wiley-VCH GmbH.


    Mingyu Ou, Richeng Lian, Rongjia Li, Jiahui Cui, Haocun Guan, Jianhao Zhu, Lei Liu, Chuanmei Jiao, Xilei Chen. A High-Efficient DOPO-Based Flame Retardant as a Co-Curing Agent for Simultaneously Enhancing the Fire Safety and Mechanical Properties of Epoxy Resin. Macromolecular rapid communications. 2023 Sep;44(18):e2300262

    Expand section icon Mesh Tags

    Expand section icon Substances

    PMID: 37335812

    View Full Text