EPR Study of Backbiting in the Aqueous‐Solution Polymerization of Acrylamide
作者： Hendrik Kattner , Michael Buback
关键词: Electron paramagnetic resonance 、 Polymer 、 Radical 、 Photochemistry 、 Aqueous solution 、 Polymerization 、 Butyl acrylate 、 Acrylamide 、 Radical polymerization 、 Chemistry
摘要: Via electron paramagnetic resonance (EPR) spectroscopy, the type of radicals occurring during acrylamide (AAm) homopolymerization in aqueous solution is investigated between -5 and +100 °C. The are produced photochemically under stationary conditions. Midchain AAm (MCRs) clearly identified by EPR which demonstrates that secondary propagating (SPRs) undergo backbiting reactions. Above 50 °C, fraction MCRs even exceeds one SPRs. extent however well below butyl acrylate polymerization at identical temperature.
sci-hub.se 参考文章(32)
Hendrik Kattner, Patrick Drawe, Michael Buback, Novel Access to Propagation Rate Coefficients of Radical Polymerization by the SP–PLP–EPR Method Macromolecular Chemistry and Physics. ,vol. 216, pp. 1737- 1745 ,(2015) , 10.1002/MACP.201500191
Michael Buback, Mark Egorov, Robert G. Gilbert, Vladimir Kaminsky, Oskar F. Olaj, Gregory T. Russell, Philipp Vana, Gerhard Zifferer, Critically evaluated termination rate coefficients for free-radical polymerization, 1. The current situation Macromolecular Chemistry and Physics. ,vol. 203, pp. 2570- 2582 ,(2002) , 10.1002/MACP.200290041
Johannes Barth, Michael Buback, Pascal Hesse, Tatiana Sergeeva, Termination and Transfer Kinetics of Butyl Acrylate Radical Polymerization Studied via SP-PLP-EPR Macromolecules. ,vol. 43, pp. 4023- 4031 ,(2010) , 10.1021/MA1006039
Laura Hermosilla, Paloma Calle, Carlos Sieiro, Nuria García, Pilar Tiemblo, Julio Guzmán, DFT study of the EPR spectral pattern of propagating methacrylic radicals Chemical Physics. ,vol. 340, pp. 237- 244 ,(2007) , 10.1016/J.CHEMPHYS.2007.09.004
Johannes Barth, Michael Buback, Gregory T. Russell, Sebastian Smolne, Chain-Length-Dependent Termination in Radical Polymerization of Acrylates Macromolecular Chemistry and Physics. ,vol. 212, pp. 1366- 1378 ,(2011) , 10.1002/MACP.201000781
Hendrik Kattner, Michael Buback, Detailed Investigations into Radical Polymerization Kinetics by Highly Time‐Resolved SP–PLP–EPR Macromolecular Symposia. ,vol. 333, pp. 11- 23 ,(2013) , 10.1002/MASY.201300091
Anatoly N. Nikitin, Robin A. Hutchinson, The Effect of Intramolecular Transfer to Polymer on Stationary Free Radical Polymerization of Alkyl Acrylates Macromolecules. ,vol. 38, pp. 1581- 1590 ,(2005) , 10.1021/MA048361C
Makoto Azukizawa, Bunichiro Yamada, David J. T. Hill, Peter J. Pomery, Radical polymerization of phenyl acrylate as studied by ESR spectroscopy: concurrence of propagating and mid-chain radicals Macromolecular Chemistry and Physics. ,vol. 201, pp. 774- 781 ,(2000) , 10.1002/(SICI)1521-3935(20000401)201:7<774::AID-MACP774>3.0.CO;2-K
M. J. Roedel, The Molecular Structure of Polyethylene. I. Chain Branching in Polyethylene during Polymerization1 Journal of the American Chemical Society. ,vol. 75, pp. 6110- 6112 ,(1953) , 10.1021/JA01120A005
B Yamada, M Azukizawa, H Yamazoe, D.J.T Hill, P.J Pomery, Free radical polymerization of cyclohexyl acrylate involving interconversion between propagating and mid-chain radicals Polymer. ,vol. 41, pp. 5611- 5618 ,(2000) , 10.1016/S0032-3861(99)00794-6