Premium
Polytetrafluoroethylene decomposition in air and nitrogen
Author(s) -
Conesa J. A.,
Font R.
Publication year - 2001
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10908
Subject(s) - thermogravimetry , thermal decomposition , decomposition , polytetrafluoroethylene , materials science , pyrolysis , inert gas , nitrogen , combustion , inert , atmospheric pressure , thermogravimetric analysis , atmosphere (unit) , benzene , kinetics , kinetic energy , mass spectrometry , chemical engineering , polymer , analytical chemistry (journal) , composite material , organic chemistry , chemistry , thermodynamics , meteorology , chromatography , engineering , physics , quantum mechanics
Abstract The kinetics of the thermal decomposition of polytetrafluoroethylene (PTFE) have been studied using dynamic TG‐DTG at heating rates between 1 and 25°C/min at atmospheric pressure. Two different atmospheres were used: on the one hand, an inert atmosphere (N 2 )in order to study the pyrolysis of the material, and on the other hand an oxidative atmosphere (synthetic air) to study the combustion of the polymer. The same kinetic model has been applied simultaneously to runs performed at different heating rates and different atmospheres allowing a good correlation of the weight loss data. The kinetic model considers that the overall decomposition of the PTFE is done via two different parallel processes. Dynamic measurements were performed by combined thermogravimetry mass spectrometry (TG‐MS) in order to determine the decomposition products. The evolution of 2 F 4 , CF 4 , COF 2 , HF, hydrocarbons, benzene and some other compounds has been also analyzed.