Unprecedented Sequence Control and Sequence-Driven Properties in a Series of AB-Alternating Copolymers Consisting Solely of Acrylamide Units |
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Authors: | Yuki Kametani Dr François Tournilhac Prof Dr Mitsuo Sawamoto Prof Dr Makoto Ouchi |
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Institution: | 1. Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510 Japan;2. Molecular, Macromolecular Chemistry, and Materials, CNRS, ESPCI-Paris, PSL Research University, 10 rue Vauquelin, 75005 Paris, France;3. Institute of Science and Technology Research, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi, 487-8501 Japan |
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Abstract: | Herein, we report a method to synthesize a series of alternating copolymers that consist exclusively of acrylamide units. Crucial to realizing this polymer synthesis is the design of a divinyl monomer that contains acrylate and acrylamide moieties connected by two activated ester bonds. This design, which is based on the reactivity ratio of the embedded vinyl groups, allows a “selective” cyclopolymerization, wherein the intramolecular and intermolecular propagation are repeated alternately under dilute conditions. The addition of an amine to the resulting cyclopolymers afforded two different acryl amide units, i.e., an amine-substituted acryl amide and a 2-hydroxy-ethyl-substituted acryl amide in alternating sequence. Using this method, we could furnish ten types of alternating copolymers; some of these exhibit unique properties in solution and in the bulk, which are different from those of the corresponding random copolymers, and we attributed the differences to the alternating sequence. |
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Keywords: | Alternierende Copolymere Copolymerisation Cyclopolymerisation Polyacrylamide Radikalpolymerisation |
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