2,4,6‐trichlorophenyl acrylate emulsion‐templated porous polymers (PolyHIPEs). Morphology and reactivity studies |
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Authors: | Nermina Leber Jonathan D B Fay Neil R Cameron Peter Krajnc |
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Institution: | 1. Laboratory for Organic and Polymer Chemistry, Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova 17, SI‐2000 Maribor, Slovenia;2. Department of Chemistry, IRC in Polymer Science and Technology, University of Durham, South Road, Durham DH1 3LE, United Kingdom;3. Neil R. Cameron, Department of Chemistry, IRC in Polymer Science and Technology, University of Durham, South Road, Durham DH1 3LE, United Kingdom;4. Peter Krajnc, Laboratory for Organic and Polymer Chemistry, Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova 17, SI‐2000 Maribor, Slovenia |
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Abstract: | A series of monolithic crosslinked polymers with 2,4,6‐trichlorophenyl acrylate as a reactive component was prepared by free radical polymerization of the internal phases of high internal phase emulsions (HIPEs). The volume ratio of water to oil phase (void volume; 60–90%), crosslinker type (divinylbenzene or ethylenglycol dimethacrylate) and quantity (30–50 mol %) and type of porogenic solvent (chlorobenzene, toluene, chloroform, dichloroethane) were altered to study these effects on the structure and reactivity of the monolithic polymers. The polymer supports were characterized by scanning electron microscopy (SEM), FTIR spectroscopy, elemental analysis and mercury intrusion porosimetry. SEM images revealed an open cellular structure with voids between 1 and 12 μm and window sizes between 0.3 and 3 μm. The porogen had an influence on the surface area, being larger with added porogen and the influence being highest with toluene. Adding toluene also influenced the void size, increasing the average diameter from ~2 μm (no porogen) to ~12 μm (added toluene). Monolithic supports were functionalized by reaction of the ester moieties with tris(2‐aminoethyl)amine derivative and by hydrolysis of the ester groups to carboxylic acids. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 4043–4053, 2007 |
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Keywords: | aryl acrylates emulsion polymerization emulsion templating functionalization of polymers macroporous polymers monoliths morphology PolyHIPE polymer supports supports 2 4 6‐trichlorophenyl acrylate |
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