In this study, we investigate the impact of Isophorone diisocyanate functionalized graphene oxide (IPDI-GO) on the flame retardancy of rigid polyurethane foam (RPUF). IPDI-GO was synthesized and introduced into the RPUF matrix. The flame retardancy of RPUF was significantly enhanced by the incorporation of IPDI-GO, as evidenced by a reduction in peak heat release rate (PHRR) by 25% and total smoke production (TSP) by 15% in comparison to pure RPUF when IPDI-GO was incorporated at 3 wt%. Scanning electron microscopy (SEM) revealed that IPDI-GO contributed to the formation of a compact, continuous char layer on the RPUF surface. This study underscores the potential of IPDI-GO as a promising flame retardant additive for RPUF.

Preparation and effect evaluation of rigid polyurethane flame retardant modified by graphene
    Abstract
    1 Introduction
    2 Experimental
        2.1 Materials
        2.2 Preparation of IPDI-GO
        2.3 Preparation of IPDI-GORPUF
        2.4 CONE calorimetry analysis
    3 Results and discussion
    4 Conclusion
    References

• Jianlian Liu(School of Railway Transportation, Hunan Technical College of Railway High-Speed, Hengyang 421002, Hunan, China)
• Binghuan Wang(School of Railway Transportation, Hunan Technical College of Railway High-Speed, Hengyang 421002, Hunan, China)
• Kui Zi(School of Railway Transportation, Hunan Technical College of Railway High-Speed, Hengyang 421002, Hunan, China)
• Jiankui Yu(School of Railway Transportation, Hunan Technical College of Railway High-Speed, Hengyang 421002, Hunan, China)
• Peisuo Li(School of Railway Transportation, Hunan Technical College of Railway High-Speed, Hengyang 421002, Hunan, China)