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- W4309348442 abstract "Abstract Effective flame retardant strategy for open‐cell foam (e.g., polyHIPE) remains of a great challenge. Herein, a void surface flame retardant strategy for polyHIPE was presented. An open‐cell polystyrene (PS) polyHIPE was fabricated through an emulsion‐templating technique. Polyphosphazene (PSZ), a highly efficient flame retardant polymer, was then in situ fabricated and covalently attached to the void surface of the foam to be a uniform flame retardant protective layer, while the open‐cell structure of the foam was perfectly preserved. Compared with the pristine PS polyHIPE, the PSZ modified one had significantly improved thermal stability (char residues yield at 800°C increased from 3.36 to 16.53 wt%) and mechanical properties (Young's modulus increased by 2.6 times); the values of average heat release rate and total heat release of combustion were reduced by 62.36% and 41.57%, respectively. While, the value of limiting oxygen index was increased from 17.39% to 19.75%, owing to the combined action of condensed phase flame retardant and gas phase flame retardant. These results indicate that the in situ surface modification strategy is effective for improving the flame retardancy of highly interconnected polymer foams." @default.
- W4309348442 created "2022-11-26" @default.
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- W4309348442 date "2022-11-15" @default.
- W4309348442 modified "2023-10-16" @default.
- W4309348442 title "A void surface flame retardant strategy for polymeric <scp>polyHIPEs</scp>" @default.
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- W4309348442 doi "https://doi.org/10.1002/app.53397" @default.
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