Crosslinking nitroxide-mediated radical copolymerization of styrene with divinylbenzene
Por:
Scott A.J., Nabifar A., Hernández-Ortiz J.C., McManus N.T., Vivaldo-Lima E., Penlidis A.
Publicada:
1 feb 2014
Resumen:
Results from the crosslinking kinetics of nitroxide-mediated radical polymerization (NMRP) of styrene (STY) in the presence of a small amount of divinylbenzene (DVB) are presented. The performance of styrene polymerization with N-tert-butyl-N-(2-methyl-1-phenylpropyl)-O-(1-phenylethyl) hydroxylamine (referred to as TIPNO-based alkoxyamine or I-TIPNO) is first examined to see if the system exhibits controlled behavior. Then, typical profiles for crosslinking NMRP of STY/DVB in the presence of this alkoxyamine (as controller) are presented and contrasted with crosslinking under regular free radical polymerization, and NMRP of styrene (in the absence of crosslinker). Subsequently, the performance of crosslinking NMRP is evaluated based on rate of polymerization, molecular weights, polydispersity values and gel content under different operating conditions (different crosslinker and nitroxide concentrations). Finally, prediction profiles from a mathematical model are contrasted with experimental data to check the validity of the developed model with respect to both NMRP and crosslinking NMRP of STY/DVB with this TIPNO-based alkoxyamine. © 2013 Elsevier Ltd. All rights reserved.
Filiaciones:
Scott A.J.:
Institute for Polymer Research (IPR), Department of Chemical Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada
Nabifar A.:
Institute for Polymer Research (IPR), Department of Chemical Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada
Hernández-Ortiz J.C.:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Ingn Quim, Mexico City 04510, DF, Mexico
McManus N.T.:
Institute for Polymer Research (IPR), Department of Chemical Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada
Vivaldo-Lima E.:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Ingn Quim, Mexico City 04510, DF, Mexico
Penlidis A.:
Institute for Polymer Research (IPR), Department of Chemical Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada
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