Electrospray ionization mass spectrometry investigation of reversible addition fragmentation chain transfer mediated acrylate polymerizations initiated via60Co γ-Irradiation: Mapping reaction pathways

Lovestead, T. M., Hart-Smith, G., Davis, T. P., Stenzel, M. H., & Barner-Kowollik, C. (2007) Electrospray ionization mass spectrometry investigation of reversible addition fragmentation chain transfer mediated acrylate polymerizations initiated via60Co γ-Irradiation: Mapping reaction pathways. Macromolecules, 40(12).

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Abstract

Reversible addition fragmentation chain transfer (RAFT) mediated methyl acrylate and butyl acrylate polymerizations initiated via 60Co γ-irradiation were investigated using electrospray ionization mass spectrometry (ESI-MS). The polymer end-groupings were mapped using both a hybrid quadrupole-time-of-flight instrument and a quadrupole ion trap mass spectrometer. Three potential initiation processes were identified during the cumyl phenyl dithioacetate (CPDA) mediated acrylate polymerizations. CPDA dissociates into a cumyl radical and a phenyl dithioester radical (Z-group). A set of polymer product ions indicates that a small, yet significant, fraction of the γ-generated phenyl dithioacetate radical contributes to the initiation process. Furthermore, the phenyl dithioacetate group undergoes cleavage to yield thiol end groups that react to form disulfide linkages. Additionally, polymer product ions indicative of a small amount of water radiolysis were observed, and evidence that the butyl acrylate monomer interacts with γ-radiation to yield an initiating species is gained. © 2007 American Chemical Society.

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ID Code: 99157
Item Type: Journal Article
Refereed: Yes
Additional Information: Cited By :36
Export Date: 5 September 2016
CODEN: MAMOB
Correspondence Address: Stenzel, M.H.; Centre for Advanced Macromolecular Design, School of Chemical Sciences and Engineering, University of New South Wales, Sydney, NSW 2052, Australia; email: m.stenzel@unsw.edu.au
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Keywords: Alcohols, Electrospray ionization, Monomers, Polymerization, Radiolysis, Reaction kinetics, Cumyl phenyl dithioacetate (CPDA), Disulfide linkages, Electrospray ionization mass spectrometry (ESI-MS), Methyl acrylates, Reversible addition fragmentation chain transfer (RAFT), Mass spectrometry
DOI: 10.1021/ma0701484
ISSN: 00249297
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 22 Sep 2016 04:50
Last Modified: 11 Oct 2016 05:06

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