Retardation in RAFT Polymerization: Does Cross-Termination Occur with Short Radicals Only?
作者： S. R. Simon Ting , Thomas P. Davis , Per B. Zetterlund
DOI: 10.1021/MA200831F
关键词:
摘要: The recently proposed model by Perrier and co-workers [J. Polym. Sci., Part A: Chem. 2009, 47, 3455] to account for retardation effects in dithiobenzoate-mediated reversible addition–fragmentation chain transfer (RAFT) polymerization of styrene has been tested experimentally. According this model, is caused cross-termination very short radicals only. Polymerizations were conducted employing a macroazoinitiator polymeric RAFT agent based on cumyl dithiobenzoate, thereby effectively eliminating all from the system. results show, basic agreement with that there little, if any, absence radicals.
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) Y. K. Chong, Julia Krstina, Tam P. T. Le, Graeme Moad, Almar Postma, Ezio Rizzardo, San H. Thang, Thiocarbonylthio Compounds [SC(Ph)S−R] in Free Radical Polymerization with Reversible Addition-Fragmentation Chain Transfer (RAFT Polymerization). Role of the Free-Radical Leaving Group (R) Macromolecules. ,vol. 36, pp. 2256- 2272 ,(2003) , 10.1021/MA020882H
Angelo Alberti, Massimo Benaglia, Michele Laus, Dante Macciantelli, Katia Sparnacci, Direct ESR Detection of Free Radicals in the RAFT Polymerization of Styrene Macromolecules. ,vol. 36, pp. 736- 740 ,(2003) , 10.1021/MA025713B
Michelle L. Coote, Leo Radom, Ab initio evidence for slow fragmentation in RAFT polymerization Journal of the American Chemical Society. ,vol. 125, pp. 1490- 1491 ,(2003) , 10.1021/JA028645H
S. Oae, T. Yagihara, T. Okabe, Reduction of semipolar sulphur linkages with carbodithioic acids and addition of carbodithioic acids to olefins Tetrahedron. ,vol. 28, pp. 3203- 3216 ,(1972) , 10.1016/S0040-4020(01)93661-0
Yungwan Kwak, Atsushi Goto, Koichi Komatsu, Yukio Sugiura, Takeshi Fukuda, Characterization of low-mass model 3-arm stars produced in reversible addition-fragmentation chain transfer (RAFT) process Macromolecules. ,vol. 37, pp. 4434- 4440 ,(2004) , 10.1021/MA049823P
Andrew Ah Toy, Hugh Chaffey-Millar, Thomas P Davis, Martina H Stenzel, Ekaterina I Izgorodina, Michelle L Coote, Christopher Barner-Kowollik, None, Thioketone spin traps as mediating agents for free radical polymerization processes Chemical Communications. pp. 835- 837 ,(2006) , 10.1039/B515561D
Yungwan Kwak, Atsushi Goto, Takeshi Fukuda, Rate Retardation in Reversible Addition−Fragmentation Chain Transfer (RAFT) Polymerization: Further Evidence for Cross-Termination Producing 3-Arm Star Chain Macromolecules. ,vol. 37, pp. 1219- 1225 ,(2004) , 10.1021/MA030434P
Aileen R. Wang, Shiping Zhu, Yungwan Kwak, Atsushi Goto, Takeshi Fukuda, Michael S. Monteiro, A difference of six orders of magnitude: A reply to “the magnitude of the fragmentation rate coefficient” Journal of Polymer Science Part A. ,vol. 41, pp. 2833- 2839 ,(2003) , 10.1002/POLA.10853
Patricia Geelen, Bert Klumperman, Intermediate radical termination in reversible addition-fragmentation chain transfer-mediated polymerization: Identification of termination products Macromolecules. ,vol. 40, pp. 3914- 3920 ,(2007) , 10.1021/MA0628634
Achim Feldermann, Michelle L Coote, Martina H Stenzel, Thomas P Davis, Christopher Barner-Kowollik, None, Consistent experimental and theoretical evidence for long-lived intermediate radicals in living free radical polymerization Journal of the American Chemical Society. ,vol. 126, pp. 15915- 15923 ,(2004) , 10.1021/JA046292B