Counterflow flames of ultrahigh-molecular-weight polyethylene with and without triphenylphosphate

Counterflow flames of ultrahigh-molecular-weight polyethylene with and without triphenylphosphate Научная публикация

Журнал

Combustion and Flame
ISSN: 0010-2180 , E-ISSN: 1556-2921

Вых. Данные

Год: 2016, Том: 169, Страницы: 261-271 Страниц : DOI: 10.1016/j.combustflame.2016.04.019

Ключевые слова

Counterflow flame of polymer; Flame retardancy; Flame structure; Polymer flammability; Phosphorus-containing compounds; Thermal degradation of polymers

Авторы

Korobeinichev O. P. ¹ , Gonchikzhapov M. B. ^1,2 , Paletsky A. A. ¹ , Tereshchenko A. G. ¹ , Shundrina I. K. ^2,3 , Kuibida L. V. ^1,2 , Shmakov A. G. ^1,2 , Hu Y. ⁴

Организации

1	(Данные Web of science) Voevodsky Inst Chem Kinet & Combust, Inst Skaya Str 3, Novosibirsk 630090, Russia
2	(Данные Web of science) Novosibirsk State Univ, Pirogova Str 2, Novosibirsk 630090, Russia
3	(Данные Web of science) Novosibirsk Organ Chem Inst, Lavrentiev Ave 9, Novosibirsk 630090, Russia
4	(Данные Web of science) Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230027, Peoples R China

To study the mechanism of flame retardancy, counter-flow flames of air and ultrahigh-molecular-weight polyethylene (UHMWPE) with triphenylphosphate (TPP) added, and also without it, were studied at atmospheric pressure. Burning rates were measured. Also the thermal and chemical structure of these counter-flow flames (with and without TPP added) was investigated. The concentrations of the heavy products from the polymer's thermal degradation were measured by sampling the flame at 0.8 mm from the polymer's surface. Temperature profiles in both the flame and the condensed phase were measured, as well as the temperature of the polymer's burning surface, the concentration profiles of 8 species (N-2, O-2, CO2, CO, H2O, C3H6, C4H6, C6H6) and finally the concentration profile for a hypothetical species, whose molecular weight was the average of more than 50 hydrocarbons containing C-7-C-25. The effect of adding TPP to UHMWPE on all the above characteristics indicates that TPP changes what is occurring in both the condensed phase and in the flame. Chromatography and FUR spectroscopy revealed the formation of phosphorus-containing compounds (phosphates, ethers, and carbonates) on the surface of the burning polymer. Elemental analysis showed half the TPP additive remains in the condensed phase and half goes into the flame. Adding 5 wt% of TPP to UHMWPE reduced the burning rate; also the composition of the heavy products from the destruction of this polyethylene was changed markedly by the additive. In fact, the maximum in the distribution of heavy hydrocarbons shifted towards lighter masses. All these facts indicate that TPP does have a real effect in the condensed phase. However, the lowering of the polymer's flammability was ascribed to the effect of TPP on gas-phase processes, as manifested by: a widening of the flame front, a decrease in the maximum flame temperature and a reduction of the extinction strain rate. Overall, these observations do indicate that TPP (a retardant of hydrocarbon flames) reduces the flammability of UHMWPE by a gas-phase mechanism. (C) 2016 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

Korobeinichev O.P. , Gonchikzhapov M.B. , Paletsky A.A. , Tereshchenko A.G. , Shundrina I.K. , Kuibida L.V. , Shmakov A.G. , Hu Y.
Counterflow flames of ultrahigh-molecular-weight polyethylene with and without triphenylphosphate
Combustion and Flame. 2016. V.169. P.261-271. DOI: 10.1016/j.combustflame.2016.04.019 WOS Scopus РИНЦ

Опубликована в печати:

1 июл. 2016 г.

Web of science	WOS:000378583600021
Scopus	2-s2.0-84967163249
РИНЦ	27157278
OpenAlex	W2403363775