Synthesis of PNIPAM polymer brushes on reduced graphene oxide based on click chemistry and RAFT polymerization |
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Authors: | Yongfang Yang Xiaohui Song Liang Yuan Mao Li Jinchuan Liu Rongqin Ji Hanying Zhao |
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Affiliation: | 1. Institute of Polymer Science and Engineering, Hebei University of Technology, Tianjin 300130, People's Republic of China;2. Key Laboratory of Functional Polymer Materials, Ministry of Education, Department of Chemistry, Nankai University, Tianjin 300071, People's Republic of China |
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Abstract: | Preparation and characterization of poly(N‐isopropylacrylamide) (PNIPAM) polymer brushes on the surfaces of reduced graphene oxide (RGO) sheets based on click chemistry and reversible addition‐fragmentation chain transfer (RAFT) polymerization was reported. RGO sheets prepared by thermal reduction were modified by diazonium salt of propargyl p‐aminobenzoate, and alkyne‐functionalized RGO sheets were obtained. RAFT chain transfer agent (CTA) was grafted to the surfaces of RGO sheets by click reaction. PNIPAM on RGO sheets was prepared by RAFT polymerization. Fourier transform‐infrared spectroscopy, thermogravimetric analysis, X‐ray photoelectron spectroscopy, and transmission electron microscopy (TEM) results all demonstrated that RAFT CTA and PNIPAM were successfully produced on the surfaces of RGO sheets. Nanosized PNIPAM domains on RGO sheets were observed on TEM. Micro‐DSC result indicated that in aqueous solution PNIPAM on RGO sheets presented a lower critical solution temperature at 33.2 °C. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012 |
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Keywords: | click chemistry living radical polymerization (LRP) nanocomposites poly(N‐isopropylacrylamide) (PNIPAM) polymer brushes reduced graphene oxide reversible addition‐fragmentation chain transfer (RAFT) polymerization |
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