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Isothermal pyrolysis of a fire retardant coating heated by free convection in air

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Abstract

Pyrolysis studies of a fire retardant coating were conducted under isothermal conditions by taking into account the kinetic data of the overall reaction and the heat transfer process. The coating was made of Polyurethane and chlorinated paraffin. A 160Μm thick film was heated by free convection from heated air, and conduction through the coating. Profiles of temperature developed through the coating were obtained by calculation, as well as those of loss in weight due to the thermal decomposition. The thermal conduction did not vary because of the formation of a porous char resulting from the coating decomposition.

Zusammenfassung

Untersuchungen der Pyrolyse eines feuerretardierenden überzuges wurden unter isothermen Bedingungen ausgeführt, wobei die Kinetik des Gesamtprozesses und der Proze\ der WÄrmeübertragung Berücksichtung fanden. Der überzug bestand aus Polyurethan und chloriertem Paraffin. Ein 160Μm dicker Film wurde durch freie Konvektion mit erhitzter Luft aufgeheizt. Die sich im überzug ausbildenden Temperaturprofile und die durch thermische Zersetzung verursachten Gewichtsverluste wurden berechnet. VerÄnderungen in der WÄrmeleitfÄhigkeit treten nicht auf, da als Zersetzungsprodukt eine poröse Kohle gebildet wird.

РЕжУМЕ

ИсслЕДОВАНИь пИРОлИ жА ОгНЕстОИкИх пОкРы тИИ БылИ пРОВЕДЕНы В ИжОт ЕРМИЧЕскИх УслОВИьх, УЧИтыВАь кИ НЕтИЧЕскИЕ ДАННыЕ ОБ ЩЕИ РЕАкцИИ И пРОцЕсс пЕРЕНОсА тЕ плА. пОкРытИь БылИ ИжгОтО ВлЕНы Иж пОлИУРЕтАНА И хлОРИРОВАННОгО пАРА ФИНА. плЕНкА тОлЩИНОИ 160 ММк НАгРЕВАлАсь ЕстЕ стВЕННОИ кОНВЕкцИЕИ гОРьЧЕгО ВОжДУхА И пРОВОДИМОс тьУ ЕгО ЧЕРЕж пОкРытИЕ. Вы ЧИслЕНы тЕМпЕРАтУРН ыЕ пРОФИлИ, ВОжНИкАУЩИЕ ЧЕРЕж пО кРытИЕ, А тАкжЕ тЕМпЕРАтУРА п ОтЕРИ ВЕсА, ОБУслОВлЕ ННОгО тЕРМИЧЕскИМ РАжлОжЕ НИЕМ. тЕплОпРОВОДНОс ть НЕ ИжМЕНьлАсь, ВслЕДс тВИЕ ОБРАжОВАНИь пОР ИстОгО ОБУглЕННОгО ОстАткА, ОБРАжУУЩЕгОсь пРИ РАжлОжЕНИь пОкРы тИИ.

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Abdul, M., Bhatnagar, V.M. & Vergnaud, J.M. Isothermal pyrolysis of a fire retardant coating heated by free convection in air. Journal of Thermal Analysis 29, 1107–1113 (1984). https://doi.org/10.1007/BF02188863

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  • DOI: https://doi.org/10.1007/BF02188863

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