Determination by MALDI-TOF MS of the structures obtained from polytransesterification of diethyl 2,6-pyridinedicarboxylate and poly(ethylene glycol)

Polyesters from reaction of diethyl 2,6-pyridinedicarboxylate with poly(ethylene glycol) 1000 were synthesized through a polytransesterification process using titanium(IV) alkoxide as catalyst. The resulting polyesters were characterized by size-exclusion chromatography (SEC) and matrix-assisted las...

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Bibliographic Details
Published in:European polymer journal 2006, Vol.42 (1), p.126-132
Main Authors: Soutif, Jean-Claude, Doan, Nhung T.H., Montembault, Véronique
Format: Article
Language:English
Subjects:
Applied sciences
Chemical Sciences
Exact sciences and technology
MALDI-TOF MS
Organic polymers
Physicochemistry of polymers
Polycondensation
Polyesters
Polymers
Preparation, kinetics, thermodynamics, mechanism and catalysts
Titanium(IV) alkoxide
Transesterification
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Summary:Polyesters from reaction of diethyl 2,6-pyridinedicarboxylate with poly(ethylene glycol) 1000 were synthesized through a polytransesterification process using titanium(IV) alkoxide as catalyst. The resulting polyesters were characterized by size-exclusion chromatography (SEC) and matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS). The structures of the polyesters were established and revealed the formation of several cyclic and linear populations of varying size. Detailed analysis of the MALDI-TOF mass spectra of the obtained polyesters has revealed the presence of linear polycondensates bearing various end groups among which those attributed to an exchange reaction between alkyl groups of the catalyst and ester groups of the polycondensates.
ISSN:0014-3057
1873-1945
DOI:10.1016/j.eurpolymj.2005.07.026