Effects of metal chelates on a novel oligomeric intumescent flame retardant system for polypropylene

Song, Pingan ORCID: https://orcid.org/0000-0003-1082-652X and Fang, Zhengping and Tong, Lifang and Jin, Yongming and Lu, Fengzhu (2008) Effects of metal chelates on a novel oligomeric intumescent flame retardant system for polypropylene. Journal of Analytical and Applied Pyrolysis, 82 (2). pp. 286-291. ISSN 0165-2370


A novel oligomeric phosphorus-nitrogen containing intumescent flame retardant, poly(4,4-diamino diphenyl methane-O-bicydicpentaerythritol phosphate-phosphate) (PDBPP), was synthesized and characterized. Effects of metal chelates on flame retardancy of polypropylene (PP)/PDBPP systems were studied and the results showed that the presence of metal chelates considerably enhanced the fire retardant performance as evidenced by the increase of LOI values and a great reduction in peak heat release rate of PP/PDBPP system. Raman spectroscopy, infrared spectroscopy and scanning electron microscopy demonstrated that metal chelates could react with polyphosphoric acid, a decomposition product of PDBPP, to form crosslinked network. Through salt bridges a more compact char layer was formed which was responsible for the improved thermal and flame retardancy properties of PP/PDBPP system.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 08 Aug 2019 04:33
Last Modified: 24 Nov 2021 00:34
Uncontrolled Keywords: polypropylene, intumescent flame retardant, metal chelates, flammability
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091299 Materials Engineering not elsewhere classified
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401699 Materials engineering not elsewhere classified
Socio-Economic Objectives (2008): B Economic Development > 86 Manufacturing > 8699 Other Manufacturing > 869999 Manufacturing not elsewhere classified
Identification Number or DOI: https://doi.org/10.1016/j.jaap.2008.04.008
URI: http://eprints.usq.edu.au/id/eprint/35601

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