Тип публикации: статья из журнала

Год издания: 2023

Идентификатор DOI: 10.3390/polym15132890

Аннотация: <jats:p>The properties of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) P(3HB-co-3HHx) copolymers with different ratios of monomers synthesized by the wild-type strain Cupriavidus necator B-10646 on sugars, and an industrial sample from Kaneka synthesized by the recombinant strain C. necator NSDG-ΔfadB1 on soybean oil, were studiedПоказать полностьюin a comparative aspect and in relation to poly(3-hydroxybutyrate) P(3HB). The copolymer samples, regardless of the synthesis conditions or the ratio of monomers, had reduced values of crystallinity degree (50–60%) and weight average molecular weight (415–520 kDa), and increased values of polydispersity (2.8–4.3) compared to P(3HB) (70–76%, 720 kDa, and 2.2). The industrial sample had differences in its thermal behavior, including a lower glass transition temperature (−2.4 °C), two peaks in its crystallization and melting regions, a lower melting point (Tmelt) (112/141 °C), and a more pronounced gap between Tmelt and the temperature of thermal degradation (Tdegr). The process, shape, and size of the spherulites formed during the isothermal crystallization of P(3HB) and P(3HB-co-3ННx) were generally similar, but differed in the maximum growth rate of the spherulites during exothermic crystallization, which was 3.5–3.7 μm/min for P(3HB), and 0.06–1.25 for the P(3HB-co-3HHx) samples. The results from studying the thermal properties and the crystallization mechanism of P(3HB-co-3HHx) copolymers are important for improving the technologies for processing polymer products from melts.</jats:p>

Журнал: Polymers

Выпуск журнала: Т.15, №13

Номера страниц: 2890

ISSN журнала: 20734360

Место издания: Basel

Издатель: MDPI

• Volova Tatiana G. (School of Fundamental Biology and Biotechnology, Siberian Federal University, Svobodnyi Av. 79, 660041 Krasnoyarsk, Russia)
• Uspenskaya Mayya V. (Chemical Engineering Center, Research Institute «Bioengineering» ITMO University, Kronverksky Pr. 49, 197101 Saint Petersburg, Russia)
• Kiselev Evgeniy G. (School of Fundamental Biology and Biotechnology, Siberian Federal University, Svobodnyi Av. 79, 660041 Krasnoyarsk, Russia)
• Sukovatyi Aleksey G. (School of Fundamental Biology and Biotechnology, Siberian Federal University, Svobodnyi Av. 79, 660041 Krasnoyarsk, Russia)
• Zhila Natalia O. (School of Fundamental Biology and Biotechnology, Siberian Federal University, Svobodnyi Av. 79, 660041 Krasnoyarsk, Russia)
• Vasiliev Aleksander D. (Basic Department of Solid State Physics and Nanotechnology, School of Engineering Physics and Radio Electronics, Siberian Federal University, Kirensky St. 26, 660074 Krasnoyarsk, Russia)
• Shishatskaya Ekaterina I. (Chemical Engineering Center, Research Institute «Bioengineering» ITMO University, Kronverksky Pr. 49, 197101 Saint Petersburg, Russia)

• Ядро РИНЦ (eLIBRARY.RU)