View in EDS

Combined MALDI–TOF MS and NMR characterization of copoly(arylen ether sulphone)s

Saved in:
Bibliographic Details
Title: Combined MALDI–TOF MS and NMR characterization of copoly(arylen ether sulphone)s
Authors: Puglisi, Concetto1, Samperi, Filippo1 fsamperi@unict.it, Cicala, Gianluca2, Recca, Antonino2 arecca@dmfci.unict.it, Restuccia, Carmelo Luca2
Source: Polymer. Mar2006, Vol. 47 Issue 6, p1861-1874. 14p.
Subjects: Copolymers, Polymers, Oligomers, Sulfones, Chlorine
Abstract: Abstract: The synthesis and the chemical characterization of some novel random copolyethersulphones of the type P(ESES-co-EES) (Polyethersulphone-ethersulphone:Polyetherethersulphone), is reported. The ESES:EES molar ratio was varied from 80:20 to 20:80 and all the copolymers were terminated with reactive amino groups, and then were fully characterized through (1H and 13C)-NMR and MALDI–TOF MS analysis to confirm their chemical structures and chemical compositions. End chains were revealed by these techniques. Contrary to chlorine-ended copolymers, oligomers terminated with hydroxyl groups were revealed in the amine-ended copolymers, indicating that transetherification reactions occur during the capping reaction with m-aminophenol. Cycles were also revealed by MALDI–TOF MS, that revealed also some unexpected end chains may be formed for the impurities in the feed. The glass transition temperatures of the copolymers have been determined by differential scanning calorimetry (DSC). [Copyright &y& Elsevier]
Copyright of Polymer is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:Abstract: The synthesis and the chemical characterization of some novel random copolyethersulphones of the type P(ESES-co-EES) (Polyethersulphone-ethersulphone:Polyetherethersulphone), is reported. The ESES:EES molar ratio was varied from 80:20 to 20:80 and all the copolymers were terminated with reactive amino groups, and then were fully characterized through (1H and 13C)-NMR and MALDI–TOF MS analysis to confirm their chemical structures and chemical compositions. End chains were revealed by these techniques. Contrary to chlorine-ended copolymers, oligomers terminated with hydroxyl groups were revealed in the amine-ended copolymers, indicating that transetherification reactions occur during the capping reaction with m-aminophenol. Cycles were also revealed by MALDI–TOF MS, that revealed also some unexpected end chains may be formed for the impurities in the feed. The glass transition temperatures of the copolymers have been determined by differential scanning calorimetry (DSC). [Copyright &y& Elsevier]
ISSN:00323861
DOI:10.1016/j.polymer.2006.01.045