Synthesis and characterization of amphiphilc block copolymer poly(methyl acrylic acid)-block-polytetrahydrofuran |
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Authors: | Guojian Wang Deyue Yan |
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Affiliation: | (1) College of Chemistry and Chemical Technology, Shanghai Jiao Tong University, 200240 Shanghai, China |
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Abstract: | Under the specially designated condition the polymerization of both tetrahydrofuran (THF) andtert-butyl methacrylate (tBMA) is a living one. The diblock copolymer, poly(tert-butyl methacrylate)-block-polytetrahydrofuran (PtBMA-b-PTHF), was successfully synthesized by means of the coupling reaction of living cationic PTHF+, SbF6 with living anionic PtBMA-, Li+. LiCI, which has a beneficial effect on the molecular weight distribution (MWD) in the anionic polymerization of (meth)acrylates, hinders the coupling reaction of living chains and cannot be used in the preparation of tBMA precursor. The hydrolysis of the aforementioned diblock copolymer under acid condition results in the amphiphilic diblock copolymer, i.e. poly(methy1 acrylic acid)-block-polytetrahydrofuran (PMAA-b-PTHF). The diblock copolymers were characterized with GPC and IR. |
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Keywords: | amphiphilic diblock copolymer coupling reaction living polymerization tert-butyl methacrylate methylacrylic acid tetrahydrofuran |
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