Long-lived intermediates in reversible addition-fragmentation chain-transfer (RAFT) polymerization generated by γ radiation
Barner-Kowollik, C., Vana, P., Quinn, J. F., & Davis, T. P. (2002) Long-lived intermediates in reversible addition-fragmentation chain-transfer (RAFT) polymerization generated by γ radiation. Journal of Polymer Science, Part A: Polymer Chemistry, 40(8).
A novel experimental procedure is presented that allowed probing of reversible addition-fragmentation chain-transfer (RAFT) free-radical polymerizations for long-lived species. The new experimental sequence consisted of gamma irradiation of a mixture of initial RAFT agent (cumyl dithiobenzoate) and monomer at ambient temperature, a subsequent predetermined waiting period without initiation source also at ambient temperature, and then heating of the reaction mixture to a significantly higher temperature. After each sequence step, the monomer conversion and molecular weight distribution were determined, indicating that controlled polymer formation occurs only during the heating period. The results indicated that stable intermediates (either radical or nonradical in nature) are present in such experiments because thermal self-initiation of the monomer can be excluded as the reason for polymer formation. © 2002 Wiley Periodicals, Inc. J. Polym. Sci. Part A: Polym. Chem.
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|Item Type:||Journal Article|
|Additional Information:||Cited By :145
Export Date: 5 September 2016
Correspondence Address: Davis, T.P.; Ctr. for Adv. Macromolecular Design, Sch. of Chem. Eng. and Indust. Chem., University of New South Wales, Sydney, NSW 2052, Australia; email: firstname.lastname@example.org
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|Keywords:||Living polymerization, Radiation, Radical polymerization, Reaction intermediates, Reversible addition fragmentation chain transfer (RAFT), Gamma rays, Irradiation, Molecular weight, Monomers, Free radical polymerization, polymerization|
|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:||22 Sep 2016 04:50|
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