Properties of degradable polyhydroxyalkanoates with different monomer compositions : научное издание

Volova T.; Ryltseva G.; Dudaev A.; Shishatskaya E.

Дополнительные ссылки: eLibrary

База данных: Каталог библиотеки СФУ

Библиографическое описание: Properties of degradable polyhydroxyalkanoates with different monomer compositions : научное издание / T. Volova [et al.]. - Текст : непосредственный // Public Health and Toxicology. - 2021. - Т. 1, № S. - P. 19. - ISSN 2732-8929, DOI 10.18332/pht/142133.

Аннотация: To synthesize and investigate polyhydroxyalkanoates (PHAs) with different monomer composition and percentages and polymer films prepared from them. Various PHAs: homopolymer poly-3-hydroxybutyrate P(3HB) and 2-, 3-, and 4-component copolymers comprising various combinations of 3-hydroxybutyrate (3HB), 3-hydroxyvalerate (3HV), 4-hydroxybutyrate (4HB), and 3-hydroxyhexanoate (3HHx) monomers were synthesized under specialized conditions. Relationships were found between the monomer composition of PHAs and their molecular-weight and thermal properties and degree of crystallinity. All copolymers had decreased weight average molecula rweights, Mw (to 390–600 kDa), and increased values of polydispersity (3.2–4.6) compared to the P(3HB). PHA copolymers showed different thermal behavior: an insignificant decrease in Tmelt and the presence of the second peak in the melting region and changes in parameters of crystallization and glass transition. At the same time, they retained thermostability, and the difference between Tmelt and Tdegr was at least 100–120 °C. Incorporation of 4HB, 3HV, and 3HHx monomer units into the 3-hydroxybutyrate chain caused changes in the amorphous to crystalline ratio and decreased the degree of crystallinity (Cx) to 20–40%. According to the degree to which the monomers reduced crystallinity, they were ranked as follows: 4HB – 3HHx – 3HV. A unique set of films was produced; their surface properties and physical/mechanical properties were studied as dependent on PHA composition; monomers other than 3-hydroxybutyrate were found to enhance hydrophilicity, surface development, and elasticity of polymer films.

Год издания: 2021

Авторы: Volova T. , Ryltseva G. , Dudaev A. , Shishatskaya E.

Издательство: European Publishing, Heraklion

Источник: Public Health and Toxicology

Выпуск: Т. 1

Номера страниц: 19

Держатель оригинала документа: Institute of Biophysics (Siberian Branch, Russian Academy of Sciences), Federal Research Center “Krasnoyarsk Science Center SB RAS”, Siberian Federal University

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Properties of degradable polyhydroxyalkanoates with different monomer compositions : статья из журнала

Volova T. и др.
2021 год