Langford, C. R., Johnson, D. W. and Cameron, Neil R. (2014) Chemical functionalization of emulsion-templated porous polymers by thiol–ene “click” chemistry. Polymer Chemistry, 5 (21). pp. 6200-6206. doi:10.1039/C4PY00713A ISSN 1759-9954.

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Abstract

Highly porous polymers (polyHIPEs) have been prepared by the photopolymerization of high internal phase emulsions (HIPEs) with varying ratios of thiol and acrylate monomers. The resulting polymers have a nominal porosity of 80%, and are seen to have a well-defined, interconnected pore morphology, with average pore diameters ranging from 30 to 60 μm. The polyHIPE polymers have been shown using a colourimetric (Ellman's) assay to contain residual thiols which are reactive towards a range of (meth)acrylates (hexafluoroisopropyl acrylate, fluorescein O-acrylate and poly(ethylene glycol) methyl ether methacrylate). Functionalization was explored using thermally- and UV-initiated radical-mediated “click” reactions and an amine-catalysed Michael addition reaction. The extent of functionalization was investigated qualitatively and quantitatively using a range of techniques (solid state NMR spectroscopy; FTIR spectroscopy; X-ray photoelectron spectroscopy (XPS); observation of fluorescence); high levels of conversion (up to 90–95%) were observed for the thermally-initiated radical reaction and the Michael reaction.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry T Technology > TP Chemical technology
Divisions:	Faculty of Science, Engineering and Medicine > Engineering > Engineering
Library of Congress Subject Headings (LCSH):	Porous materials, Emulsions, Photopolymerization, Thiols, Acrylates
Journal or Publication Title:	Polymer Chemistry
Publisher:	Royal Society of Chemistry
ISSN:	1759-9954
Official Date:	7 November 2014
Dates:	Date Event 7 November 2014 Published 15 July 2014 Available 14 July 2014 Accepted 21 May 2014 Submitted
Volume:	5
Number:	21
Page Range:	pp. 6200-6206
DOI:	10.1039/C4PY00713A
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Date of first compliant deposit:	19 January 2017
Date of first compliant Open Access:	20 January 2017
Funder:	Engineering and Physical Sciences Research Council (EPSRC), European Science Foundation (ESF)

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