Molar Mass Dispersity Control by Iodine-mediated Reversible-deactivation Radical Polymerization |
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Authors: | Wang Jin-Ying Ni Yuan-Yuan Cheng Jian-Nan Zhang Li-Fen Cheng Zhen-Ping |
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Institution: | 1.State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China ; |
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Abstract: | Dispersity(D)of polymers has a great effect on the properties of polymeric materials,and therefore how to control D is very important but still a huge challenge in polymer synthesis,especially for reversible-deactivation radical polymerization(RDRP)strategy.Herein,we successfully developed a novel strategy to adjust D of polymers by visible light-controlled reversible complexation mediated living radical polymerization(RCMP)and combination of single-electron transfer-degenerative chain transfer living radical polymerization(SET-DTLRP)at room temperature.In RCMP system,2-iodo-2-methylpropionitrile(CP-I)and ethyl 2-iodo-2-phenylacetate(EIPA)were used as alkyl iodide initiators,by using methyl methacrylate(MMA)as the model monomer and n-butylacrylate(BA)as the end-capping reagent to regulate D of polymers.Subsequently,we successfully prepared the block copolymer PMMA-b-PBA with adjustable D by reactivating the polymer end-chains via SET-DTLRP in the presence of copper wire,fully demonstrating that it is a promising strategy that can keep the"living"feature of polymers while regulating their molar mass dispersities easily. |
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Keywords: | Dispersity control Iodine-mediated reversible-deactivation radical polymerization(RDRP) Visible light-controlled polymerization Reversible complexation mediated living radical polymerization(RCMP) Single-electron transfer-degenerative chain transfer |
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