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Determination of cyclic polyester oligomers by gel permeation chromatography and matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry
Author(s) -
Laine Olli,
Österholm Heidi,
Seläntaus Maaria,
Järvinen Hannele,
Vainiotalo Pirjo
Publication year - 2001
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.460
Subject(s) - chemistry , polyester , trimer , gel permeation chromatography , oligomer , mass spectrometry , adipic acid , phthalic anhydride , terephthalic acid , matrix assisted laser desorption/ionization , isophthalic acid , polymer chemistry , chromatography , dimer , phthalic acid , desorption , organic chemistry , polymer , adsorption , catalysis
Polyesters prepared from adipic acid (AA), phthalic anhydride (PA), isophthalic acid (IPA), terephthalic acid (TPA), and 2‐butyl‐2‐ethyl‐1,3‐propanediol (BEPD) were investigated by gel permeation chromatography (GPC) and matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry(MALDI‐TOFMS). All polyesters were found to contain a fraction of low molecular weight molecules that were identified as cyclic ester oligomers. The most abundant cyclic oligomer varied with the diacid used in the synthesis but, in every case, it was either a dimer or a trimer. In addition, the relative amounts of the polyester starting materials influenced the amount of cyclic oligomers formed in the polyesterification reaction. Copyright © 2001 John Wiley & Sons, Ltd.