Détermination des masses et des distributions moléculaires d'un poly(aryléthercétone‐co‐sulfone) semi‐cristallin (HTX) à l'aide d'une méthode de dérivatisation chimique, 1. Caractérisation moléculaire du HTX en solution dans l'acide sulfurique concentre

HTX, a poly(aryletherketone‐co‐sulfone), is characterized in solution in concentrated sulfuric acid. Upon dissolution in concentrated H2SO4, HTX is chemically modified by sulfonation of phenyl rings. The modification of the chemical structure is studied with a model compound by means of IR spectrosc...

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Bibliographic Details
Published in:Macromolecular chemistry and physics 1994-01, Vol.195 (1), p.329-345
Main Authors: Daoust, Daniel, Devaux, Jacques, Godard, Pierre, Strazielle, Claude
Format: Article
Language:English
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Summary:HTX, a poly(aryletherketone‐co‐sulfone), is characterized in solution in concentrated sulfuric acid. Upon dissolution in concentrated H2SO4, HTX is chemically modified by sulfonation of phenyl rings. The modification of the chemical structure is studied with a model compound by means of IR spectroscopy. The increase of the molar mass corresponding to a complete sulfonation is determined by means of mass spectrometry. Light scattering and 19F NMR measurements are performed in order to obtain the weight‐ (M̄w)s and number‐average (M̄n)s molar masses of sulfonated HTX samples. (M̄w)s values allow the determination of the Mark‐Houwink‐Sakurada relationship for HTX in 99,5% H2SO4 at 25°C.
ISSN:1022-1352
1521-3935
DOI:10.1002/macp.1994.021950130