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

✍ Scribed by Daniel Daoust; Jacques Devaux; Pierre Godard; Claude Strazielle

• Publisher: John Wiley and Sons
• Year: 1994
• Tongue: English
• Weight: 767 KB
• Volume: 195
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.1994.021950130

✦ Synopsis

Abstract

HTX, a poly(aryletherketone‐co‐sulfone), is characterized in solution in concentrated sulfuric acid. Upon dissolution in concentrated H~2~SO~4~, 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 ^19^F NMR measurements are performed in order to obtain the weight‐ (M̄~w~)~s~ and number‐average (M̄~n~)~s~ molar masses of sulfonated HTX samples. (M̄~w)~~s~ values allow the determination of the Mark‐Houwink‐Sakurada relationship for HTX in 99,5% H~2~SO~4~ at 25°C.