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Synthesis, Thermoresponsive Behavior, and Catalytic Properties of Amphiphilic Diblock Copolymers of N-vinylcaprolactam and N-vinylimidazoleстатья
- Авторы: Barabanova Anna I., Blagodatskikh Inesa V., Vyshivannaya Oxana V., Muranov Alexander V., Peregudov Alexander S., Khokhlov Alexei R.
- Журнал: Polymer Science, Series A
- Том: 63
- Номер: 4
- Год издания: 2021
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- Оригинальные версии: Синтез, термочувствительное поведение и каталитические свойства амфифильных диблок-сполимеров N-винилкапролактама и N-винилимидазола
- DOI: 10.1134/S0965545X21040027
- Аннотация: Thermoresponsive diblock copolymers (DCs) have been prepared by two-stage reversible addition-fragmentation chain transfer/macromolecular design by interchange of xanthate (RAFT/MADIX) polymerization of N-vinylcaprolactam and N-vinylimidazole (VI). The poly(N-vinylcaprolactam) (PVCL) blocks were first synthesized and used as macro-chain transfer agent in VI polymerization. Temperature behavior of PVCL and DCs in aqueous media has been studied by static and dynamic light scattering. It was shown that the phase separation temperature of both PVCLs and DCs depends on the length of the PVCL chain and the composition of aqueous solvent. The temperature range above the PVCL θ-temperature and below the cloud point is characterized by the conformational rearrangements leading to the formation of mesoglobules. The study of catalytic activity of DCs in the hydrolysis reaction of p-nitrophenylpropionate has shown that their activity essentially increases in this transitional temperature region due to the formation of highly developed hydrophilic-hydrophobic interfaces inside the mesoglobules.
- Добавил в систему: Вышиванная Оксана Валентиновна
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