title: Characterization of oligomers in poly(ethylene terephthalate) by matrix-assisted laser desorption/ionization mass spectrometry.
abstract: Matrix-assisted laser desorption/ionization mass spectrometry was used for the characterization of extracted and synthesized oligo(ethylene terephthalate)s. Generally, cyclic oligomers [GT]n could be found in technical yarns and tiles, whereas our synthesized model oligomers mainly consisted of linear chains H-[GT]n-G. In addition, some other distributions could be identified as H-[GH]n-OH and H-[GGT]1-[GT]n-7/-G linear oligomers and H-[GGT]1-[GT]n-1 cyclic oligomers, where G is an ethylene glycol unit, GG is a diethylene glycol unit, caused by impurities of ethylene glycol, and T is a terephthalic acid unit. NMR and IR investigations were carried out to verify these results.
authors.affiliation: Federal Institute of Materials Research and Testing (BAM), Berlin, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Weidner
authors.forename: G
authors.initials: G
authors.lastname: Kühn
authors.forename: U
authors.initials: U
authors.lastname: Just
mesh_terms: D007834:Lasers; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008970:Molecular Weight; D011093:Polyethylene Terephthalates / Q000737:chemistry*; D011108:Polymers; D013055:Spectrophotometry, Infrared
chemical_list: D011093:Polyethylene Terephthalates; D011108:Polymers