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Abstract No.: ThP-209
Session: Polymer Characterization
Presentation date: Thu, Aug 31, 2006
Presentation time: 09:50 – 11:20

Multistage Mass Spectrometry for Determination of Copolymers Architecture

Grazyna Adamus1

1 Polish Academy of Sciences, Centre of Polymer Chemistry, Zabrze, Poland

Correspondence address: Grazyna Adamus, Polish Academy of Sciences, Centre of Polymer Chemistry, 34 M. Curie-Sklodowska St, Zabrze, 41-819 Poland.

Keywords: Electrospray Ionization (ESI); Ionspray; Mass Spectrometer; Polymer.

Novel aspect: Novel results concerned with the evaluation of the subtle structure of the synthetic aliphatic (co)polyesters, based on sequencing of individual macromolecular ions with the aid of ion-trap multistage mass spectrometry (ESI-MSn) will be discussed.

 

The knowledge of structure-properties relationship in polymeric materials is essential for their successful exploitation. (Co)polymers are usually show more than one direction of inhomogeneity consistent with the methods involved in their synthesis. In addition to molar mass distribution the distribution with respect to chemical composition, functionality and topology are observed, consequently structural and molecular analysis of copolymers is frequently difficult and quite complex. Mass spectrometry of polymers is a rapidly growing field recently. Matrix assisted laser desorption ionization, (MALDI), and electrospray ionisation, (ESI), are suitable techniques for the structural studies of polymers because they permit the formation of ions from such macromolecules, with little or no fragmentation during ionisation process.1 The relative intensities of the mass peaks appearing at the mass spectra of copolymers are dependent on chemical structure, composition and the type of distribution of comonomer units in the copolymer chains.2 Additional insight into the structure of a individual copolymer chains can be achieved by multistage mass spectrometry (MSn), where the molecular ion of interest is separated from all other ions formed during ionisation and is induced to dissociate into fragments that can be used for diagnose of chemical structure of copolymer end groups and of comonomer sequence distribution.3
In this work new results concerned with assembling of desired macromolecular architecture of novel biorelated (co)polyesters will be demonstrated. (Co)polymers possessing required composition and suitable end groups have been prepared on the way of polytransesterification of selected lactones with hydroxycarboxylic acids. Novel results concerned with the evaluation of the subtle structure of the (co)polyesters obtained, based on sequencing of individual macromolecular ions with the aid of ion-trap multistage mass spectrometry (ESI-MSn) will be discussed.

References
1. Mass Spectrometry of Polymers, Eds.G. Montaudo, R. P. Lattimer, CRC Press: Boca Raton, FL (2002).
2. G. Adamus, P. Rizzarelli, M. S. Montaudo, M. Kowalczuk and G. Montaudo, Rapid Commun. Mass Spectrom. 20, 804 (2006).
3. G. Adamus, M. S. Montaudo, G. Montaudo and M. Kowalczuk, Rapid Commun. Mass Spectrom. 18, 1436 (2004).

Acknowledgement The work was supported by Polish Ministry of Education and Science (grants: 3 T08E 022 30 and EUREKA E!3420).