MOLECULAR-WEIGHT DISTRIBUTION OF POLY(DIMETHYLSILOXANE) BY COMBINING MATRIX-ASSISTED LASER-DESORPTION IONIZATION TIME-OF-FLIGHT MASS-SPECTROMETRY WITH GEL-PERMEATION CHROMATOGRAPHY FRACTIONATION (Articolo in rivista)

Type
Label
  • MOLECULAR-WEIGHT DISTRIBUTION OF POLY(DIMETHYLSILOXANE) BY COMBINING MATRIX-ASSISTED LASER-DESORPTION IONIZATION TIME-OF-FLIGHT MASS-SPECTROMETRY WITH GEL-PERMEATION CHROMATOGRAPHY FRACTIONATION (Articolo in rivista) (literal)
Anno
  • 1995-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1002/rcm.1290091215 (literal)
Alternative label
  • MONTAUDO G, MONTAUDO MS, PUGLISI C, SAMPERI F, (1995)
    MOLECULAR-WEIGHT DISTRIBUTION OF POLY(DIMETHYLSILOXANE) BY COMBINING MATRIX-ASSISTED LASER-DESORPTION IONIZATION TIME-OF-FLIGHT MASS-SPECTROMETRY WITH GEL-PERMEATION CHROMATOGRAPHY FRACTIONATION
    in RCM. Rapid communications in mass spectrometry
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • MONTAUDO G, MONTAUDO MS, PUGLISI C, SAMPERI F, (literal)
Pagina inizio
  • 1158 (literal)
Pagina fine
  • 1163 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 9 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 6 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 12 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • polimeri catania (literal)
Titolo
  • MOLECULAR-WEIGHT DISTRIBUTION OF POLY(DIMETHYLSILOXANE) BY COMBINING MATRIX-ASSISTED LASER-DESORPTION IONIZATION TIME-OF-FLIGHT MASS-SPECTROMETRY WITH GEL-PERMEATION CHROMATOGRAPHY FRACTIONATION (literal)
Abstract
  • Abstract: Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) allows detection of large molecules such as those present in synthetic and natural macromolecules. Until recently, it was reported that MALDI-TOF measurements can provide correct molecular weight (MW) estimates only for nearly monodisperse polymer samples. We have now developed a methodology for polydisperse samples. We recorded the gel-permeation chromatography (GPC) trace of a polydisperse polymeric sample of poly(dimethylsiloxane) (PDMS), collecting 42 fractions. Selected fractions were analyzed by MALDI-TOF and the average MW of each fraction was determined, allowing a calibration of GPC curves against absolute MW. The calibrated GPC trace was then used to compute average MW and molecular-weight distribution (MWD) of the unfractionated poly(dimethylsiloxane) sample. In the spectra of low molecular-weight fractions, the resolution is high enough to resolve the contributions of the various PDMS oligomers as separate signals. (literal)
Prodotto di
Autore CNR

Incoming links:


Autore CNR di
Prodotto
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
data.CNR.it