Ring‐opening polymerization of cyclohexene oxide by recyclable scandium triflate in room temperature ionic liquid |
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| Authors: | Jun Ling Lixin You Yifei Wang Zhiquan Shen |
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| Affiliation: | MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | In this article, we provide a concept of a two‐phase polymerization system consisting of immiscible monomer and room temperature ionic liquid (IL). The catalyst is immobilized in the IL phase where polymerization takes place. The produced polymer is extracted by the monomer, and the remaining IL phase is catalytically active for more polymerizations. Thus, common volatile organic solvents are no longer needed. Ring‐opening polymerization of cyclohexene oxide (CHO) in 1‐n‐butyl‐3‐methylimidazolium tetrafluoroborate IL (bmim]BF4]) using scandium triflate Sc(OTf)3] catalyst serves as a realistic example of such concept. The yield of polyCHO in bmim]BF4] is higher than that in bulk. IL containing Sc(OTf)3 can be used for at least three times. A circulatory polymerization process is carried out with added catalyst to keep a relatively high yield in following circulation processes. The assignments of proton signals of polyCHO in 1H NMR are discussed in detail. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012 |
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| Keywords: | room temperature ionic liquid ring‐opening polymerization scandium triflate catalysts polyethers |
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