Flame Retardancy Behaviors of Flexible Polyurethane Foam Based on Reactive Dihydroxy P–N-containing Flame Retardants
| Autor: | Yu-lin Ding, Yumiao Su, Jia-jing Huang, Wenmu Li, Ting Wang, Min-Yu Li |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | ACS Omega ACS Omega, Vol 6, Iss 25, Pp 16410-16418 (2021) |
| ISSN: | 2470-1343 |
| DOI: | 10.1021/acsomega.1c01267 |
| Popis: | Green and environment-friendly high-efficiency flame retardants (FRs) are crucial to polymer FR modification. Here, a green FR 2-((bis(2-hydroxyethyl)amino)methyl)-5,5-dimethyl-1,3,2-dioxaphosphinane 2-oxide (HAMPP) was synthesized. The HAMPP was incorporated with a cyclic phosphorus structure, which will readily carbonize to inhibit or prevent further combustion. Moreover, the HAMPP contains dihydroxy reactive groups that can be used as a monomer in the polymerization reaction to obtain the main chain containing phosphorus polymer. Research studies on FRs were based on flexible polyurethane foam (PU-HAMPPs). The limiting oxygen index value of PU foam with 10% HAMPP could reach 23.7%, passing a UL-94 V-0 rating together. With the addition of HAMPP, the peak heat release rate of PU foam decreased significantly, the decomposition temperature increased, the heat release capacity reduced by 31%, and the char yield increased by 42%. The chemical composition and morphology of the char residual have been studied and analyzed thoroughly. We find that HAMPP forms a molten viscous protective layer uniformly on the material surface and releases some incombustible gases. These indicated that the FR exploited both condensed-phase and gas-phase flame retardancy mechanisms. Besides, the addition of FRs improved the mechanical properties. |
| Databáze: | OpenAIRE |
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