Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/13793
Title: Thioketone-Mediated Polymerization with Dithiobenzoates: Proof for the Existence of Stable Radical Intermediates in RAFT Polymerization
Authors: JUNKERS, Tanja 
Delaittre, Guillaume
Chapman, Robert
Guenzler, Fabian
Chernikova, Elena
Barner-Kowollik, Christopher
Issue Date: 2012
Publisher: WILEY-V C H VERLAG GMBH
Source: MACROMOLECULAR RAPID COMMUNICATIONS, 33 (11), p. 984-990
Abstract: A novel dithioester control agent [dimethyltetrathioterephtalate (DMTTT)] is presented for the thioketone-mediated radical polymerization (TKMP) of n-butyl acrylate. The rate of polymerization is significantly decreased in the presence of DMTTT indicating formation of dormant radical species. During polymerization, molar masses increase linearly with monomer conversion with reasonably narrow initial molar mass distributions (PDI between 1.3 and 1.8), whereas the dispersity increases during the course of the polymerization due to irreversible termination of both propagating and dormant radicals. The present results thus highlight the possibility of a mixed mechanism operating in RAFT polymerization, which combines slow fragmentation (long-lived intermediates) and intermediate radical termination.
Notes: [Junkers, Thomas; Delaittre, Guillaume; Guenzler, Fabian; Barner-Kowollik, Christopher] Karlsruhe Inst Technol, Inst Tech & Polymerchem, D-76131 Karlsruhe, Germany. [Junkers, Thomas] Univ Hasselt, Inst Mat Res, Polymer React Design Grp, BE-3590 Diepenbeek, Belgium. [Delaittre, Guillaume] Karlsruhe Inst Technol, Inst Zool, D-76131 Karlsruhe, Germany. [Chapman, Robert] Univ New S Wales, Ctr Adv Macromol Design, Sydney, NSW 2052, Australia. [Chernikova, Elena] Moscow MV Lomonosov State Univ, Fac Chem, Polymer Dept, Moscow 119991, Russia.
Keywords: Polymer Science; controlled/living radical polymerization; dithiobenzoate; radical stability; reversible addition-fragmentation transfer; thioketone;controlled; living radical polymerization; dithiobenzoate; radical stability; reversible addition-fragmentation transfer; thioketone
Document URI: http://hdl.handle.net/1942/13793
ISSN: 1022-1336
e-ISSN: 1521-3927
DOI: 10.1002/marc.201200128
ISI #: 000304831900005
Category: A1
Type: Journal Contribution
Validations: ecoom 2013
Appears in Collections:Research publications

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