Flynn, K.
, Blair, W.
and Danis, P.
(2021),
Comparison of Molecular Weight Moments from MALDI-TOF-MS With Other Absolute Methods on a Standard Reference Polymer, ANTEC Conference Proceedings
(Accessed March 25, 2025)
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Comparison of Molecular Weight Moments from MALDI-TOF-MS With Other Absolute Methods on a Standard Reference Polymer
Published
Author(s)
, , P O. Danis
Abstract
Matrix Assisted Laser Desorption Ionization (MALDI) Time of Flight (TOF) Mass Spectrometry was used to study the molecular weight distribution (MWD) and the number of α-methyl styrene (α-MeSty) repeat units in SRM 1487, a narrow MWD poly (methyl methacrylate) standard reference material of about 6300 g/mole which was initiated with α-MeSty. It was found that each PMMA polymer chain had from zero to seven alpha-MeStys per chain. The MWD of the polymer chains containing a fixed number of α-MeStys was obtained. The MWD, Mw and the average number of α-MeSty at a given molecular weight from MALDI TOF MS compare well with those obtained from more traditional methods like ultracentrifugation and Size Exclusion Chromatography (SEC).Citation
ANTEC Conference Proceedings
Pub Type
Journals
Keywords
copolymer, copolymer distribution, mass spectroscopy, materials, matrix assisted laser desorption, molecular weight distribution, PMMA, poly(methyl methacrylate), {alpah}-methyl styrene initiation
Citation
Issues
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Created October 12, 2021