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Synthesis of a novel intumescent flame retardant and its flame retardancy in polypropylene

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Abstract

Microencapsulated ammonium polyphosphate (GMFAPP) is prepared by in situ polymerization method with a shell of poly(ethylene glycol) modified melamine-formaldehyde resin. Due to the presence of shell, GMFAPP shows less size, higher water resistance and flame retardancy in polypropylene (PP) compared with ammonium polyphosphate (APP). The flame retardant action of GMFAPP and APP in PP are studied using LOI, UL-94 and cone calorimeter, and their thermal stability is evaluated by thermogravimetric apparatus. The limiting oxygen index (LOI) value of the PP/GMFAPP at the same loading is higher than the value of PP/APP. UL-94 ratings of PP/GMFAPP can reach V-0 at 30 wt% loading. The water resistant properties of the PP composites are studied, and the results of the composites containing with APP and GMFAPP are compared. The cone results put forward that GMFAPP is an effective flame retardant in PP compared with APP. Moreover, the thermal oxidative behavior of GMFAPP is evaluated by dynamic FTIR to study its flame retardant mechanism in PP.

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Acknowledgements

The financial supports from the Teamwork Projects Funded by Guangdong Natural Science Foundation (No. E06200692) and Scientific Research Foundation for Doctor of Guangzhou Institute of Chemistry, Chinese Academy of Sciences (No. QD3) are acknowledged.

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Authors and Affiliations

  1. Key Laboratory of Cellulose and Lignocellulosics Chemistry, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, Guangdong, China

    Kun Wu & Min-Min Shen

  2. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, 230026, Anhui, China

    Yuan Hu

Authors
  1. Kun Wu
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  2. Min-Min Shen
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  3. Yuan Hu
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Correspondence to Kun Wu.

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Wu, K., Shen, MM. & Hu, Y. Synthesis of a novel intumescent flame retardant and its flame retardancy in polypropylene. J Polym Res 18, 425–433 (2011). https://doi.org/10.1007/s10965-010-9433-1

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  • DOI: https://doi.org/10.1007/s10965-010-9433-1

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