Study on performance of F-ZrP@Co-MOF synergistic intumescent flame retardant polypropylene

doi:10.16265/j.cnki.issn 1003-3033.2021.01.008

Abstract

Abstract: In order to improve thermal stability of PP and reduce negative effects of IFR on PP's mechanical properties, hexachlorocyclotriphosphazene and melamine formaldehyde resin were used to modify zirconium phosphate-metal organic framework hybrid materials (ZrP@Co-MOF) and to prepare a novel nano flame retardant F-ZrP@Co-MOF which, combined with ammonium polyphosphate and dipentaery-thritol, synthesized IFR/F-ZrP@Co-MOF flame retardant. Then, effects of F-ZrP@Co-MOF on combustion and mechanical properties of PP composites were analyzed with 25% mass-ratio addition of IFR/F-ZrP@Co-MOF.The results show that without addition of F-ZrP@Co-MOF, limiting oxygen index (LOI) of PP/IFR is 29.6% while with 3.0% addition of it, LOI value will be improved by 6.08%. With 1.0% addition, residual carbon contents at 800 ℃ is increased by 180.1% compared with no addition at all, and with 2.0% addition, elastic modulus will be 57.21MPa, 8.3% higher. The Raman spectrum and smoke density tests further prove that addition of F-ZrP@Co-MOF makes carbon layer more compact and stable, which is beneficial to restraining heat and smoke transfer.

Key words: zirconium hydrogenphosphate(ZrP), metal organic frameworks (MOFs), intumescent flame retardant (IFR), polypropylene (PP), thermal stability

CLC Number:

X937
TQ322

OU Hongxiang, YE Qing, XU Jiacheng, LIU Ben, SHAN Xueying, JIANG Juncheng. Study on performance of F-ZrP@Co-MOF synergistic intumescent flame retardant polypropylene[J]. China Safety Science Journal, 2021, 31(1): 52-59.

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