Polymerization of six-membered propylene oxalate

Iakimov, N.P.; Budynina, E.M.; Berkovich, A.K.; Serebryakova, M.V.; Platonov, V.B.; Fomin, E.O.; Buyanovskaya, A.G.; Mikheev, I.V.; Melik-Nubarov, N.S.

Авторы: Iakimov Nikolai P., Budynina Ekaterina M., Berkovich Anna K., Serebryakova Marina V., Platonov Vadim B., Fomin Evgenii O., Buyanovskaya Anastasia G., Mikheev Ivan V., Melik-Nubarov Nikolay S.
Журнал: European Polymer Journal
Год издания: 2024
Издательство: Pergamon Press Ltd.
Местоположение издательства: United Kingdom
Номер статьи: 113410
DOI: 10.1016/j.eurpolymj.2024.113410
Аннотация: Ring-opening polymerization (ROP) of the six-membered cyclic propylene oxalate was studied for the first time. The reaction proceeded with a high limiting conversion of about 96 % at 100 °C in the presence of tin(II) octoate. Linear macromolecules, Mw of 20–30 × 103, Ð ∼ 2, represented 86 % of the product, 4 % came from the equilibrium concentration of monomer, while the rest 10 % were cyclic oligomers consisting of 3–10 repeat units. ROP was accompanied by partial (about 30 %) conversion of the catalyst into the insoluble tin(II) oxalate in the course of polymer cross-linking reaction. The kinetics of polymerization obeyed first-order law, indicating typical for ROP constant number of active centers during the process. Polymerization without catalyst was 2000 times slower and also resulted in formation of polymer with Ð ∼ 2. Addition of benzyl alcohol to the polymerization mixture resulted in its inclusion into linear macromolecules and a decrease in their molecular weight. The results point to the possibility of synthesizing propylene oxalate block copolymers using macroinitiators with hydroxyl end groups.
Добавил в систему: Фомин Евгений Олегович

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