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Issue 9, 2011
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Synthesis and characterization of well-defined thermo- and light-responsive diblock copolymers by atom transfer radical polymerization and click chemistry

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Abstract

We synthesized a series of well-defined, stimuli-responsive diblock copolymers composed of poly(N-isopropylacrylamide) and poly(6-[4-(4-methoxyphenylazo)phenoxy]hexyl methacrylate) by atom transfer radical polymerization and click chemistry. The diblock copolymers were then characterized by nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, and gel permeation chromatography. When the azobenzene content reached 4.5 mol%, the diblock copolymer became insoluble in water. The aqueous solutions of the polymers exhibited a lower critical solution temperature (LCST) that depended on the amount of incorporated azobenzene. Higher LCSTs were observed after UV irradiation, with a maximum difference of 4.1 °C for the copolymer containing 1.4 mol% azobenzene groups. The photochemical properties of the polymer were also studied by UV-vis spectroscopy.

Graphical abstract: Synthesis and characterization of well-defined thermo- and light-responsive diblock copolymers by atom transfer radical polymerization and click chemistry

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Publication details

The article was received on 15 Apr 2011, accepted on 31 May 2011 and first published on 09 Jun 2011


Article type: Paper
DOI: 10.1039/C1PY00165E
Citation: Polym. Chem., 2011,2, 2068-2073
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    Synthesis and characterization of well-defined thermo- and light-responsive diblock copolymers by atom transfer radical polymerization and click chemistry

    X. Tao, Z. Gao, T. Satoh, Y. Cui, T. Kakuchi and Q. Duan, Polym. Chem., 2011, 2, 2068
    DOI: 10.1039/C1PY00165E

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