Analysis of poly(ethylene oxide)-b-poly(propylene oxide) block copolymers by MALDI-TOF mass spectrometry using collision induced dissociation
Date
2010
Authors
Maciejczek A.
Mass V.
Rode K.
Pasch H.
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Abstract
Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) was used to analyse the block length of commercially available block copolymers of poly(ethylene oxide) and poly(propylene oxide) (PEO- b-PPO) based on the fragmentation behaviour in collision induced dissociation (CID) experiments. MALDI-CID-TOF2 analysis is a complex procedure depending on a number of different experimental parameters. Therefore, a step-by-step procedure was used starting with PEG and PPG standards, PEG-PPG blends and endgroup-functionalized PPGs, to understand the fragmentation behaviour of the different species. These results showed that characteristic fragment patterns of the homopolymers and PEG-PPG mixtures can be obtained that facilitate the interpretation of the fragment spectra of PEO-b-PPO di- and triblock copolymers. It was found that di- and triblock copolymers can be differentiated by their fragment spectra. In addition, the sequence of monomer units in the diblock copolymers could be determined. © 2010 Elsevier Ltd.
Description
Keywords
Block lengths, Collision induced dissociation, Complex procedure, Diblock copolymer, End groups, Experimental parameters, Functionalized, Homopolymers, MALDI TOF MS, MALDI-TOF mass spectrometry, Matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry, Monomer units, Step by step procedure, Triblock copolymers, Block copolymers, Copolymerization, Desorption, Dissociation, Ethylene, Mass spectrometry, Plastic products, Polyethylene glycols, Polypropylene oxides, Propylene, Polyethylene oxides
Citation
Polymer
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26
51
26