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Titolo:
Structural characterization of aromatic polyester resins by matrix-assisted laser desorption/ionization mass spectrometry
Autore:
Laine, O; Vainiotalo, P; Osterholm, H; Jarvinen, H;
Indirizzi:
Univ Joensuu, Dept Chem, FIN-80101 Joensuu, Finland Univ Joensuu JoensuuFinland FIN-80101 Chem, FIN-80101 Joensuu, Finland Fortum Oil & Gas, Ctr Technol, Porvoo 06101, Finland Fortum Oil & Gas Porvoo Finland 06101 Ctr Technol, Porvoo 06101, Finland Neste Chem, Polyester Europe N, Porvoo 06101, Finland Neste Chem Porvoo Finland 06101 olyester Europe N, Porvoo 06101, Finland
Titolo Testata:
EUROPEAN JOURNAL OF MASS SPECTROMETRY
fascicolo: 1, volume: 7, anno: 2001,
pagine: 15 - 23
SICI:
1469-0667(2001)7:1<15:SCOAPR>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
TIME-OF-FLIGHT; SIZE-EXCLUSION CHROMATOGRAPHY; DESORPTION IONIZATION; SYNTHETIC-POLYMERS; POLYDISPERSE POLYMERS; DISTRIBUTIONS; DISCRIMINATION; OLIGOMERS; FRACTIONATION; ELECTROSPRAY;
Keywords:
average molecular weight; end-group analysis; MALDI; mass spectrometry; polyester; polymer;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Vainiotalo, P Univ Joensuu, Dept Chem, POB 111, FIN-80101 Joensuu, FinlandUniv Joensuu POB 111 Joensuu Finland FIN-80101 suu, Finland
Citazione:
O. Laine et al., "Structural characterization of aromatic polyester resins by matrix-assisted laser desorption/ionization mass spectrometry", EUR J MASS, 7(1), 2001, pp. 15-23

Abstract

Matrix-assisted laser desorption/ionization (MALDI) mass spectrometry was used to characterize average molecular weights and end-groups of synthetic aromatic polyesters and the same characteristics were also determined for acetylated polyester samples. In addition, the progress of a polyesterification reaction was followed by mass spectrometry by investigating samples taken from the reaction mixture at different reaction times. Average molecularweights were compared with those measured by gel-permeation chromatography(GPC) and the results of quantitative end-group analysis were considered with the acid values of the polyesters. MALDI measurements were carried out using two different matrix compounds, 2,5-dihydroxybenzoic acid (DHB) and 2-(4-hydroxy-phenylazo)benzoic acid (HABA). Different matrices and derivatization of the polyester influenced the width of the polymer distribution determined by mass spectrometry and further affected the proportions of differently terminated oligomers, in addition to the average molecular weight. The relative amount of the most abundant oligomer species was increased when the polymer distribution width was increased.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 23:54:30