TY - JOUR
T1 - RAFT-mediated polymerization and grafting of sodium 4-styrenesulfonate from cellulose initiated via gamma-radiation
AU - Barsbay, Murat
AU - Guven, Olgun
AU - Davis, Thomas Paul
AU - Barner-Kowollik, Christopher
AU - Barner, Leonie
PY - 2009
Y1 - 2009
N2 - Ambient temperature (20 ?C) reversible addition fragmentation chain transfer (RAFT) polymerization of sodium 4-styrenesulfonate (SS) conducted directly in aqueous media under ?-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 ?-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 ?C was also studied which resulted in a reduced graft frequency in comparison to ?-initiated ones.
AB - Ambient temperature (20 ?C) reversible addition fragmentation chain transfer (RAFT) polymerization of sodium 4-styrenesulfonate (SS) conducted directly in aqueous media under ?-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 ?-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 ?C was also studied which resulted in a reduced graft frequency in comparison to ?-initiated ones.
UR - http://tinyurl.com/nk8ovyv
UR - https://www.scopus.com/pages/publications/59049103286
U2 - 10.1016/j.polymer.2008.12.027
DO - 10.1016/j.polymer.2008.12.027
M3 - Article
SN - 0032-3861
VL - 50
SP - 973
EP - 982
JO - Polymer
JF - Polymer
IS - 4
ER -