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Static secondary ion mass spectroscopic investigations of deuterated poly (ethylene terephthalate)
Author(s) -
Ramsden William D.
Publication year - 1991
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.740171108
Subject(s) - ethylene glycol , fragmentation (computing) , ion , ethylene , poly ethylene , chemistry , deuterium , mass spectrum , static secondary ion mass spectrometry , polymer , hydrogen , polymer chemistry , secondary ion mass spectrometry , analytical chemistry (journal) , crystallography , organic chemistry , atomic physics , physics , computer science , operating system , catalysis
Abstract The positive and negative ion static SIMS spectra of poly(ethylene terephthalate) (PET) deuterium labeled on either the ethylene glycol units or the terephthalate units were obtained and compared to those of unlabeled PET. These data confirm the ion structure assignments previously reported and allow the assignment of the origins and structures of most of the remaining peaks. The majority of the ions derive logically from the PET structure. A major mode of fragmentation f the PET chains is shown to be the break‐up of ester linkages to produce a carboxylic acid and a vinyl ester. This involves predominate transfer of a hydrogen atom from the glycol unit to the newly formed acid group. Minor, but interesting, ions have been detected which result form the recombination of fragments. These ions have structures not directly derived from the original polymer backbone and may add to the difficulties involved in analyzing the static SIMS spectra of ‘unknown’ surfaces as they suggest atomic connectivities which are not present on the original surface.