Preparation of poly(styrene‐b‐2‐hydroxyethyl acrylate) block copolymer using reverse iodine transfer polymerization |
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Authors: | Nagi Greesh Ronald Sanderson Patrice Hartmann |
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Affiliation: | 1. Department of Chemistry and Polymer Science, UNESCO Associated Centre for Macromolecules, University of Stellenbosch, Private Bag X1, 7602 Matieland, South Africa;2. Mpact Paper, South Africa, Research & Development Center, 7599 Stellenbosch |
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Abstract: | Reverse iodine transfer polymerizations (RITP) of 2‐h‐ydroxyethyl acrylate (HEA) were performed in N,N‐dimethylformamide at 75°C using AIBN as initiator. Poly(2‐hydroxyethyl acrylate) (PHEA) with Mn = 3300 g mol?1 and Mw/Mn <1.5 were obtained. Homopolymerization of styrene in RITP was also carried out under similar conditions using toluene as solvent. The resulting iodo‐polystyrene (PS‐I) with (Mn, SEC = 607 g mol?1, polydispersity index (PDI) = 1.31) was used as a macroinitiator for the synthesis of amphiphilic block copolymers based on HEA with controlled well‐defined structure. Poly(styrene‐b‐2‐hydroxyethyl acrylate) (PS‐b‐PHEA) with Mn = 13,000 g mol?1 and polydispersity index (Mw/Mn) = 1.4 was obtained, copolymer composition was characterized using 1H‐NMR and FTIR, whereas SEC and gradient HPLC were used to confirm the formation of block copolymer and the living character of polymer chains. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012 |
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Keywords: | reverse iodine transfer polymerization diblock copolymers copolymerization poly(styrene‐b‐2‐hydroxyethyl acrylate) |
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