Accession Number : AD0717860
Title : Analysis with a Pyrolysis-Gas Chromatograph-Mass Spectrometer System. Polyimides.
Descriptive Note : Technical rept.,
Corporate Author : ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (ENGLAND)
Personal Author(s) : Butt,R. I. ; Cotter,J. L.
Report Date : OCT 1970
Pagination or Media Count : 23
Abstract : A pyrolysis-gas chromatograph-mass spectrometer system was used to analyse the products from the pyrolysis of a polyimide and certain perfluoroalkylene-linked polyimides in an inert atmosphere. The major primary degradation products were carbon monoxide and carbon dioxide; in addition large amounts of silicon tetrafluoride were produced, as a secondary product, by pyrolysis of the fluorine-containing materials. Thermal decomposition schemes consistent with the formation of these products are proposed. Results obtained with model compounds suggest that perfluoroalkylene groups have a more pronounced effect on the electron-impact behaviour of the imide ring than on its thermal breakdown. (Author)
Descriptors : (*POLYMERS, *PYROLYSIS), (*HEAT RESISTANT PLASTICS, PYROLYSIS), MASS SPECTROSCOPY, GAS CHROMATOGRAPHY, DECOMPOSITION, IMIDES, HALOCARBON PLASTICS, FLUORINE COMPOUNDS, GREAT BRITAIN
Subject Categories : Polymer Chemistry
Distribution Statement : APPROVED FOR PUBLIC RELEASE