Porous, functional, poly(styrene-co-divinylbenzene) monoliths by RAFT polymerizationElectronic supplementary information (ESI) available: Results of styrene polymerization, nitrogen adsorption, SEM, EDX, back-pressure vs. flow rate graphs, hydrazine reaction with RAFT-containing monolith, elemental analyses, XPS and 13C solid state NMR. See DOI: 10.1039/c3py01015e
Herein we provide the first report of a new method for the preparation of porous functional poly(styrene- co -divinylbenzene) monoliths by use of reversible addition-fragmentation chain transfer (RAFT) polymerization. The method, exemplified by styrene-divinylbenzene copolymerization in the presence...
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Main Authors | , , , , , , |
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Format | Journal Article |
Language | English |
Published |
24.12.2013
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Online Access | Get full text |
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Summary: | Herein we provide the first report of a new method for the preparation of porous functional poly(styrene-
co
-divinylbenzene) monoliths by use of reversible addition-fragmentation chain transfer (RAFT) polymerization. The method, exemplified by styrene-divinylbenzene copolymerization in the presence of 2-cyano-2-propyl dodecyl trithiocarbonate, provides control over polymerization kinetics, monolith morphology and surface functionality. Kinetic studies of monolith formation show a period of slow copolymerization, with a rate similar to RAFT homopolymerization of styrene, followed by rapid copolymerization, with a rate similar to that observed in conventional styrene-divinylbenzene copolymerization. The time to onset of rapid polymerization (gelation) and the monolith morphology depend strongly on the RAFT agent concentration. The RAFT-synthesized monoliths show a modified morphology with smaller pores and polymer globules when compared to non-RAFT monoliths, but importantly retain good flow properties. Retention of the thiocarbonylthio group within the monolith structure in an active form for surface-functionalization of the polymeric monoliths is demonstrated by the successful RAFT "grafting from" polymerization of (4-vinylphenyl)boronic acid. These functional monoliths have potential applications in chromatography and flow chemistry.
A method for the preparation of porous functional monoliths by styrene-divinylbenzene copolymerization in the presence of 2-cyano-2-propyl dodecyl trithiocarbonate as RAFT agent provides control over polymerization kinetics, monolith morphology and surface functionality. |
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Bibliography: | C solid state NMR. See DOI 10.1039/c3py01015e vs. 13 Electronic supplementary information (ESI) available: Results of styrene polymerization, nitrogen adsorption, SEM, EDX, back-pressure flow rate graphs, hydrazine reaction with RAFT-containing monolith, elemental analyses, XPS and |
ISSN: | 1759-9954 1759-9962 |
DOI: | 10.1039/c3py01015e |