In situ H-1 NMR studies of free radical cryopolymerization

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Abstract

Free radical polymerization of DMAAm (dimethylacrylamide)-co-PEG diacrylate in a semi-frozen aqueous solution was studied using H-1 NMR, which enables to monitor the non-frozen water as well as the reaction of monomers over time. It was possible to confirm the presence of a heterogeneous system with a liquid phase where the monomers were concentrated and the reaction proceeded. The resulting macroporous polymeric structure with dense pore walls was confirmed using scanning electron microscopy (SEM). (C) 2008 Elsevier Ltd. All rights reserved.

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Subject classification (UKÄ) – MANDATORY

  • Physical Chemistry
  • Industrial Biotechnology

Keywords

  • in situ NMR study, cryopolymerization, semi-frozen state
Original languageEnglish
Pages (from-to)3855-3858
JournalPolymer
Volume49
Issue number18
Publication statusPublished - 2008
Publication categoryResearch
Peer-reviewedYes