Preparation of miktoarm star‐block copolymers PSn‐b‐PVAc4‐n via combination of ATRP and RAFT polymerization |
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| Authors: | Yansheng Qiu Wei Zhang Yuefang Yan Jian Zhu Zhengbiao Zhang Xiulin Zhu |
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| Affiliation: | 1. Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China;2. Yansheng Qiu and Wei Zhang contributed equally to this work. |
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| Abstract: | Three tetrafunctional bromoxanthate agents (Xanthate3‐Br, Xanthate2‐Br2, and Xanthate‐Br3) were synthesized. Initiative atom transfer radical polymerizations (ATRP) of styrene (St) or reversible addition fragmentation chain transfer (RAFT) polymerizations of vinyl acetate (VAc) proceeded in a controlled manner in the presence of Xanthate3‐Br, Xanthate2‐Br2, or Xanthate‐Br3, respectively. The miktoarm star‐block copolymers containing polystyrene (PS) and poly(vinyl acetate) (PVAc) chains, PSn‐b‐PVAc4‐n (n = 1, 2, and 3), with controlled structures were successfully prepared by successive RAFT and ATRP chain‐extension experiments using VAc and St as the second monomers, respectively. The architecture of the miktoarm star‐block copolymers PSn‐b‐PVAc4‐n (n = 1, 2, and 3) were characterized by gel permeation chromatography and 1H NMR spectra. Furthermore, the results of the cleavage of PS3‐b‐PVAc and PVAc2‐b‐PS2 confirmed the structures of the obtained miktoarm star‐block copolymers. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2010 |
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| Keywords: | atom transfer radical polymerization (ATRP) miktoarm star polymer radical polymerization reversible addition fragmentation chain transfer (RAFT) vinyl acetate |
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