RAFT-mediated polymerization and grafting of sodium 4-styrenesulfonate from cellulose initiated via gamma-radiation

Barsbay, Murat, Gueven, Olgun, Davis, Thomas P., Barner-Kowollik, Christopher, & Barner, Leonie (2009) RAFT-mediated polymerization and grafting of sodium 4-styrenesulfonate from cellulose initiated via gamma-radiation. Polymer, 50(4), pp. 973-982.

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Ambient temperature (20 oC) reversible addition fragmentation chain transfer (RAFT) polymerization of sodium 4-styrenesulftonate (SS) conducted directly in aqueous media under gamma-irradiation at different dose rates (0.09, 0.03 and 0.02 kGy h-1) proceeds in a controlled fashion (typically, Mw/Mn < 1.25) to near quantitative conversions via 4-cyanopentanoic acid dithiobenzoate (CPADB) mediation. By applying CPADB modified cellulose as a macro chain transfer agent, a graft copolymer with SS was prepared in aqueous media under gamma-irradiation. RAFT mediated graft polymerizations provided copolymers with higher graft frequencies compared to those obtained by conventional methods. Thermally initiated grafting of SS from a CPADB-functionalized cellulose surface at 70 oC was also studied which resulted in a reduced graft frequency in comparison to gamma-initiated ones.

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ID Code: 97491
Item Type: Journal Article
Refereed: Yes
Keywords: Cellulose; Grafting; Gamma-irradiation
DOI: 10.1016/j.polymer.2008.12.027
ISSN: 0032-3861
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: 28 Jul 2016 23:08
Last Modified: 05 Aug 2016 03:39

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