Title: Unusual Radical Copolymerization of Suprabulky Methacrylate with <i>N</i>-Hydroxysuccinmide Acrylate: Facile Syntheses of Alternating-Rich Copolymers of Methacrylic Acid and <i>N</i>-Alkyl Acrylamide
Abstract: In this work, we provide a facile methodology to synthesize AB alternating-rich copolymers made of methacrylic acid (MAA) and alkyl acrylamide units. An extremely bulky tert-alkyl methacrylate carrying ethyl and fenchol substituents (EFMA) was newly designed as a special monomer that is inactive for homopolymerization but active for copolymerization in radical polymerization. Indeed, EFMA showed a unique radical copolymerization behavior to the bulkiness, which was quite different from a general methacrylate (i.e., methyl methacrylate). The copolymerization of EFMA with an electron-deficient acrylate carrying a N-hydroxysuccinimide substituent followed by postreactions (i.e., acidolysis and aminolysis) for both units afforded an alternating-rich copolymer of MAA and alkyl acrylamide units. The sequence was characterized by 13C NMR analyses in comparison with the statistical copolymers and homopolymers. The reactivity ratio values also supported the process of alternating copolymerization. The thus-obtained alternating-rich copolymers of MAA with isopropyl acrylamide or octadecyl acrylamide showed sequence-driven solubilities and thermal response properties.
Publication Year: 2019
Publication Date: 2019-11-04
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 28
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