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Mechanism of the Anionic Ring‐Opening Oligomerization of Propylene Carbonate Initiated by the tert‐Butylphenol/KHCO 3 System
Author(s) -
Kéki Sándor,
Török János,
Deák György,
Zsuga Miklós
Publication year - 2004
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200451112
Subject(s) - propylene carbonate , chemistry , mass spectrometry , propylene oxide , mass spectrum , carbonate , electrospray ionization , condensation reaction , reaction mechanism , condensation , ionization , time of flight mass spectrometry , analytical chemistry (journal) , polymer chemistry , organic chemistry , catalysis , polymer , ion , chromatography , physics , ethylene oxide , electrode , copolymer , electrochemistry , thermodynamics
The ring‐opening oligomerization reaction of propylene carbonate in the presence of the tert‐butylphenol/KHCO 3 initiating system was studied by means of Matrix‐Assisted Laser Desorption/Ionization Time of Flight Mass Spectrometry (MALDI‐TOF MS) and Electrospray Ionization Time of Flight Mass Spectrometry (ESI‐TOF MS). According to the MS spectra obtained, different series of peaks were identified. The MS spectra clearly showed that besides the chain‐extension reaction yielding oligomers with all propylene oxide units, the formation of oligomers containing carbonate linkages in the chain, and condensation reaction between the latter two also took place. The structure of the oligomers carrying carbonate linkages was determined by the post‐source decay (PSD) MALDI‐TOF MS/MS method. Based on the MS results, a mechanism for the oligomerization reaction is proposed.