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Reference type: Journal
Authors: Ma Y, Pan GQ, Zhang Y, Guo XZ, Zhang HQ
Article Title: Comparative study of the molecularly imprinted polymers prepared by reversible addition-fragmentation chain transfer ''bulk'' polymerization and traditional radical ''bulk'' polymerization.
Publication date: 2013
Journal: Journal of Molecular Recognition
Volume: 26
Issue: (5)
Page numbers: 240-251.
DOI: 10.1002/jmr.2267

Abstract: Bisphenol A (BPA) and propranolol-imprinted polymers have been prepared via both reversible addition-fragmentation chain transfer ''bulk'' polymerization (RAFTBP) and traditional radical ''bulk'' polymerization (TRBP) under similar reaction conditions, and their equilibrium binding properties were compared in detail for the first time. The chemical compositions, specific surface areas, equilibrium bindings, and selectivity of the obtained molecularly imprinted polymers (MIPs) were systematically characterized. The experimental results showed that the MIPs with molecular imprinting effects and quite fast binding kinetics could be readily prepared via RAFTBP, but they did not show improved template binding properties in comparison with those prepared via TRBP, which is in sharp contrast to many previous reports. This could be attributed to the heavily interrupted equilibrium between the dormant species and active radicals in the RAFT mechanism because of the occurrence of fast gelation during RAFTBP. The findings presented here strongly demonstrates that the application of controlled radical polymerizations (CRPs) in molecular imprinting does not always benefit the binding properties of the resultant MIPs, which is of significant importance for the rational use of CRPs in generating MIPs with improved properties. Copyright 2013 John Wiley & Sons, Ltd
Template and target information: bisphenol A, BPA, propranolol
Author keywords: molecular imprinting, RAFT polymerization, traditional radical polymerization, ''bulk'' polymerization, gelation

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