Laser pyrolysis of polymers and its relation to polymer fire behaviour

Gao, Fei; Price, Dennis; Milnes, G.J.; Eling, B.; Lindsay, Christopher D.; McGrail, P.T.

doi:10.1016/s0165-2370(97)00044-2

Cited by 23 publications

(7 citation statements)

References 15 publications

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“…Combustion and pyrolysis mechanisms and smoke released from PU polymers have been studied using a variety of analytical tools such as thermogravimetric analysis (TGA), differential thermal analysis (DTA) and differential scanning calorimetry (DSC). Analysis methods including thermogravimetric analysismass spectrometry (TG-MS), 42 thermogravimetric analysis coupled with Fourier transformed infrared spectroscopy (TG-FTIR), 30 gas chromatography-mass spectrometry (GC-MS), 43 high performance liquid chromatography analysis with uorescence detection (HPLC-FD), 44 laser pyrolysis and time-of-ight mass spectrometry 45 and synchrotron radiation vacuum ultraviolet photoionization mass spectrometry (SVUV-PIMS) 46 are specically used to characterize the gas phase and condensed phase products formed from the combustion and pyrolysis of PU.…”

Section: Combustion and Thermal Degradation Of Pumentioning

confidence: 99%

Recent studies on the decomposition and strategies of smoke and toxicity suppression for polyurethane based materials

2016

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Section: Combustion and Thermal Degradation Of Pumentioning

confidence: 99%

Recent studies on the decomposition and strategies of smoke and toxicity suppression for polyurethane based materials

2016

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“…Wang et al [4] synthesized polyurethanes with different amounts of flame retardant poly(bispropoxyphosphazene) to study the thermal degradation behavior of these polyurethanes with TG and TG-FTIR. Gao et al [5] applied laser pyrolysis and time-offlight mass spectrometry to the study of rapid thermal degradation of rigid polyurethane foams with different ranges of isocyanate and fire retardants. They deduced that the polypropylene glycol was the major flammable compound evolved during laser pyrolysis and the concentration of this compound in the volatiles reduced when the amount of isocyanate increased.…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis and combustion study of flexible polyurethane foam

Garrido

Font

2015

Journal of Analytical and Applied Pyrolysis

125

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The thermal degradation of flexible polyurethane foam has been studied under different conditions by thermogravimetric analysis (TG), thermogravimetric analysis-infrared spectrometry (TG-IR) and thermogravimetric analysis-mass spectrometry (TG-MS). For the kinetic study, dynamic and dynamic+isothermal runs were performed at different heating rates (5, 10 and 20 ºC min an inert atmosphere, started the decomposition breaking the urethane bond to produce long chains of ethers which were degraded immediately in the next step.However, under an oxidative atmosphere, at the first step not only the urethane bonds were broken but also some ether polyols started their degradation which finished at the second step producing a char that was degraded at the last stage.

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“…Gao et al . found that increasing isocyanurate index will decrease the polyol release (the major volatile product), and it will increase the CO 2 release (a product of the isocyanurate decomposition).…”

Section: Literature Reviewmentioning

confidence: 99%

Mass loss and flammability of insulation materials used in sandwich panels during the pre‐flashover phase of fire

et al. 2017

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Summary Nowadays, buildings contain more and more synthetic insulation materials in order to meet the increasing energy‐performance demands. These synthetic insulation materials have a different response to fire. In this study, the mass loss and flammability limits of different sandwich panels and their cores (polyurethane (PUR), polyisocyanurate (PIR) and stone wool) are studied separately by using a specially designed furnace. Expanded polystyrene and extruded polystyrene are tested on their cores only. The research has shown that the actual mass loss of synthetic and stone wool‐based cores is comparable up to 300 °C. From 300 °C onwards, the mass loss of PUR panels is significant higher. The mass losses up to 350 °C are 7%, 29% and 83% for stone wool, PIR and PUR respectively, for the influenced area. Furthermore, delamination can be observed at exposure to temperatures above 250 °C for the synthetic and 350 °C for the mineral wool panels. Delamination occurs due to the degradation of the resin between core and metal panels and the gasification of the (PUR) core. The lower flammability limits have been established experimentally at 9.2% m/m (PUR) and 3.1% m/m (PS). For PUR, an upper limit of 74% was found. For PIR and mineral wool, no flammability limits could be established. Copyright © 2017 John Wiley & Sons, Ltd.

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Laser pyrolysis of polymers and its relation to polymer fire behaviour

Cited by 23 publications

References 15 publications

Recent studies on the decomposition and strategies of smoke and toxicity suppression for polyurethane based materials

Recent studies on the decomposition and strategies of smoke and toxicity suppression for polyurethane based materials

Pyrolysis and combustion study of flexible polyurethane foam

Mass loss and flammability of insulation materials used in sandwich panels during the pre‐flashover phase of fire

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