Fabrication of dendrimer-like fullerene (C60) decorated oligomeric intumescent flame retardant for reducing the thermal oxidation and flammability of polypropylene nanocomposites

Song, Pingan and Liu, Hui and Shen, Yu and Du, Baoxian and Fang, Zhengping and Wu, Yu (2009) Fabrication of dendrimer-like fullerene (C60) decorated oligomeric intumescent flame retardant for reducing the thermal oxidation and flammability of polypropylene nanocomposites. Journal of Materials Chemistry, 19 (9). pp. 1305-1313. ISSN 0959-9428

Abstract

A novel oligomeric phosphorous-nitrogen-containing intumescent flame retardant poly (4,4-diaminodiphenylmethane-O-bicyclicpentaerythritol phosphate-phosphate) (PDBPP) is synthesized, and subsequently fullerene (C 60)-decorated oligomeric intumescent flame retardant, C 60-d-PDBPP, is fabricated via chemical grafting reaction and characterized. The grafting degree of C60 is as high as 70 wt%, and C60-d-PDBPP nanoparticles can homogeneously disperse in polypropylene matrix since the grafting process may prevent the aggregation of C60 particles. Upon incorporating C60-d-PDBPP, thermal oxidation degradation of polypropylene is considerably delayed. When the concentration of C60-d-PDBPP reached 2 wt%, the initial degradation temperature (T5: the temperature where 5wt% mass loss occurred) and maximum weight loss rate temperature (Tmax) display an increase of about 72°C and 80°C, respectively. Moreover, C60-d-PDBPP can remarkably reduce the peak heat release rate (PHRR) values of polypropylene, and consequently slow down the combustion process of nanocomposites. Additionally, to some extent it prolongs the time to ignition (tign) and time to peak heat release rate (tPHRR), all of which are very important parameters for evaluating the fire retardancy of a polymeric material.


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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
Date Deposited: 08 Aug 2019 00:12
Last Modified: 12 Aug 2019 05:06
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091299 Materials Engineering not elsewhere classified
Socio-Economic Objective: B Economic Development > 86 Manufacturing > 8699 Other Manufacturing > 869999 Manufacturing not elsewhere classified
Identification Number or DOI: 10.1039/b815610g
URI: http://eprints.usq.edu.au/id/eprint/35581

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