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Interaction of a phosphorus-based FR, a nanoclay and PA6-Part 1: Interaction of FR and nanoclay

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Ramani, Alwar, Hagen, Martin, Hereid, Johan, Zhang, Jianping, Bakirtzis, Dimitri and Delichatsios, Michael (2009) Interaction of a phosphorus-based FR, a nanoclay and PA6-Part 1: Interaction of FR and nanoclay. FIRE AND MATERIALS, 33 (6). pp. 273-285. [Journal article]

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DOI: 10.1002/fam.1004

Abstract

The thermal decomposition of organophosphorus fire-retardant (OP1311) and/or organonanoclay (Cloisite 30B) is hereby investigated employing thermogravimetric analysis (TGA), to give an insight into their intrinsic behaviour and interaction in polymer nanocomposites for fire safety applications, because the addition of OP1311 and Cloisite 30B in Polyamide 6 (PA6) seems to have a synergistic effect on the thermal decomposition of PA6 (part 2 of the paper). An important objective of this research was to determine to what extent phosphorus components escape in the gaseous phase, which will affect the heat of combustion of the fire-retarded polymer. The decomposition products arising from pyrolysis and combustion are investigated by means of Fourier transform infrared spectroscopy. Under pyrolytic conditions, the inclusion of Cloisite 30B into OP1311 (FR) shows a synergistic effect on the initial mass loss at low temperature of similar to 280-420 degrees C and leads to the acceleration of the thermal degradation process. While the DTG curve of Cloisite 30B shows two distinct degradation peaks (steps) that of OP1311 and OP1311 plus Cloisite 30B show four degradation steps. TGA measurements of OP1311 in nitrogen show more mass loss than in air, whereas Cloisite 30B gives similar amounts of mass loss in air and nitrogen. In nitrogen, the major evolved gaseous species from Cloisite 30B alone are hydrocarbons, 2-(diethylamino)ethanol and water, whereas the evolved gases from that of OP1311 at similar to 320 degrees C are mainly water, at similar to 420 degrees C, carbon dioxide, water and ammonia and at 480-570 degrees C diethylphosphinic acid. Under thermo-oxidative conditions, the gases evolved are mainly carbon dioxide and water from both Cloisite 30B and OP1311. Copyright (C) 2009 John Wiley & Sons, Ltd.

Item Type:Journal article
Faculties and Schools:Faculty of Art, Design and the Built Environment
Faculty of Art, Design and the Built Environment > School of the Built Environment
Research Institutes and Groups:Built Environment Research Institute
Built Environment Research Institute > Fire Safety and Engineering Research and Technology Centre (FireSERT)
ID Code:3454
Deposited By:Professor Michael Delichatsios
Deposited On:16 Dec 2009 10:33
Last Modified:25 Aug 2010 11:12

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