Flame retarding effect of graphite in rotationally molded polyethlene/graphite composites

Mhike, Washington; Ferreira, I.V.W. (Ignatius); Li, Jing; Stoliarov, Stanislav I.; Focke, Walter Wilhelm

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dc.contributor.author	Mhike, Washington
dc.contributor.author	Ferreira, I.V.W. (Ignatius)
dc.contributor.author	Li, Jing
dc.contributor.author	Stoliarov, Stanislav I.
dc.contributor.author	Focke, Walter Wilhelm
dc.date.accessioned	2015-06-15T12:32:38Z
dc.date.available	2015-06-15T12:32:38Z
dc.date.issued	2015-02
dc.description.abstract	Linear low density polyethylene (LLDPE) compounds containing 10 wt.% graphite fillers were rotationally molded into flat sheets. Flame retardancy was studied using cone calorimeter tests conducted at a radiative heat flux of 35 kW m2. Only the expandable graphite, an established flame retardant for polyethylene, significantly reduced the peak heat release rate. Compared to the neat polyethylene, it was easier to ignite the LLDPE composites containing carbon black, expandable graphite and exfoliated graphite. However, rather unexpectedly, the inclusion of flake graphite increased the time to ignition by up to 80%. Simulations conducted with the ThermaKin numerical pyrolysis software suggest that increased reflectivity was mainly responsible for this effect.	en_ZA
dc.description.embargo	2016-02-20	en_ZA
dc.description.librarian	hb2015	en_ZA
dc.description.sponsorship	The South African Research Chairs Initiative of the Department of Science and Technology (DST) and the National Research Foundation (NRF) as well as Xyris Technology CC.	en_ZA
dc.description.uri	http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1097-4628	en_ZA
dc.identifier.citation	Mhike, W, Ferreira, IVW, Li, J, Stoliarov, SI & Focke, Wl 2015, 'Flame retarding effect of graphite in rotationally molded polyethlene/graphite composites', Journal of Applied Polymer Science, vol. 132, no. 7. Art. #41472, pp. 1-11.	en_ZA
dc.identifier.issn	(0021-8995 (print)
dc.identifier.issn	1097-4628 (online)
dc.identifier.other	10.1002/app.41472
dc.identifier.uri	http://hdl.handle.net/2263/45505
dc.language.iso	en	en_ZA
dc.publisher	Wiley	en_ZA
dc.rights	© 2014 Wiley Periodicals, Inc. This is the pre-peer reviewed version of the following article : Flame retarding effect of graphite in rotationally molded polyethlene/graphite composites, Journal of Applied Polymer Science, vol. 132, no. 7, pp. 1-11, 2015, doi : 10.1002/app.41472. The definite version is available at : http://onlinelibrary.wiley.comjournal/10.1002/(ISSN)1097-4628	en_ZA
dc.subject	Rotomolding	en_ZA
dc.subject	Polyethylene	en_ZA
dc.subject	Graphite	en_ZA
dc.subject	Flammability	en_ZA
dc.subject	Cone calorimeter	en_ZA
dc.subject	Time to ignition	en_ZA
dc.subject	Modeling	en_ZA
dc.subject	Flame retardance	en_ZA
dc.subject	Polyolefins	en_ZA
dc.subject	Properties and characterization	en_ZA
dc.title	Flame retarding effect of graphite in rotationally molded polyethlene/graphite composites	en_ZA
dc.type	Postprint Article	en_ZA