Alternating copolymerization of bio-based N-acetylhomocysteine thiolactone and epoxides
نویسندگان
چکیده
The anionic ring-opening polymerizations (AROP) of bio-based N-acetyl homocysteine thiolactone (NHTL) and different epoxides were carried out using benzyl alcohol 2-tert-butylimino-2-diethylamino-1,3-dimethylperhydro-1,3,2-diazaphosphorine (BEMP) as initiating system. This polymerization is a rare example AROP in the presence an acidic moiety (acetamido group). Well-defined alternating poly(ester-alt-sulfide)s are obtained with number-average molar masses Mn ranging from 1.7 to 13.0 kg mol?1 dispersities low 1.14. one acetamido function lateral group on each repeating unit copolymers derived NHTL results very significant increases (up 94 °C) glass transition temperature Tg compared similar poly(ester-alt-sulfide) petro-based ?-butyrothiolactone (BTL). These functional poly(NHTL-alt-epoxide)s valuable structures numerous potential applications due cleavable ester redox-sensitive thioether group.
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ژورنال
عنوان ژورنال: European Polymer Journal
سال: 2021
ISSN: ['0014-3057', '1873-1945']
DOI: https://doi.org/10.1016/j.eurpolymj.2021.110490