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Synthesis of highly efficient flame retardant polypropylene nanocomposites with surfactant intercalated layered double hydroxides

Abstract

The thermal and flame retardant performances of polypropylene (PP) nanocomposites with sodium dodecyl sulfate (DDS) and stearic intercalated layered double hydroxides (DDS‒LDHs and stearic‒LDHs) were investigated in this study. The DDS‒ and stearic‒LDHs were treated using the aqueous miscible organic solvent treatment (AMOST) method to give highly dispersed platelets in PP composites. Incorporation of AMO‒DDS‒ and stearic‒LDH improved the thermal stability and flame retardancy of PP matrix significantly. The T0.5 (temperature at 50% weight loss) of PP/AMO‒stearic‒LDH (20 wt%) nanocomposites was dramatically increased by 80 °C compared to that of neat PP. The flame retardant performance was dependent on both surfactants and the loading of LDHs. The AMO‒stearic‒LDHs showed a better flame retardant properties than the AMO‒DDS‒LDHs, especially when the LDH loading was higher than ca. 7 wt%. In addition, the stearic‒LDHs with different solvothermal time including 5, 10, 24 and 72 h was studied as well. It was found out that the nanocomposites with LDHs treated by 10 h showed a best thermal stability. The PP/stearic‒LDHs (24 h) nanocomposites with 20 wt% LDH loading possessed better flame retardant performance, which PHRR reduction reached to 70%.

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Publication details

The article was received on 16 Sep 2017, accepted on 06 Oct 2017 and first published on 09 Oct 2017


Article type: Paper
DOI: 10.1039/C7DT03477F
Citation: Dalton Trans., 2017, Accepted Manuscript
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    Synthesis of highly efficient flame retardant polypropylene nanocomposites with surfactant intercalated layered double hydroxides

    L. Qiu, Y. Gao, C. Zhang, Q. Yan, D. O’Hare and Q. Wang, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT03477F

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