Главная
Авторизация
Фамилия
Пароль
Регистрация
Библиотека института физики им. Л.В. Киренского СО РАН
Базы данных
Труды сотрудников ИФ СО РАН - результаты поиска
Вид поиска
Каталог книг и брошюр библиотеки ИФ СО РАН
Каталог журналов библиотеки ИФ СО РАН
Труды сотрудников ИФ СО РАН
Область поиска
Ключевые слова
Автор
Заглавие
Год издания
Место работы автора
в найденном
Формат представления найденных документов:
полный
информационный
краткий
Отсортировать найденные документы по:
автору
заглавию
году издания
типу документа
Поисковый запрос:
(<.>K=crystallinity<.>)
Общее количество найденных документов
:
3
Показаны документы
с 1 по 3
1.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Volova, Tatiana G., Uspenskaya, Mayya V., Kiselev, Evgeniy G., Sukovatyi, Aleksey G., Zhila, Natalia O., Vasiliev A. D., Shishatskaya, Ekaterina I.
Заглавие
: Effect of monomers of 3-hydroxyhexanoate on properties of copolymers poly(3-hydroxybutyrate-co 3-hydroxyhexanoate)
Место публикации
: Polymers. - 2023. - Vol. 15, Is. 13. - Ст.2890. - ISSN 20734360 (eISSN),
DOI
10.3390/polym15132890
Примечания
: Cited References: 99. - The study was funded by the Russian Science Foundation (project No 23-64-10007)
Аннотация:
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 studied in 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-3HHx) 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.
Смотреть статью
,
WOS
,
Читать в сети ИФ
Найти похожие
2.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Volova T. G., Vinogradova O. N., Zhila N. O., Peterson I. V., Kiselev E. G., Vasiliev A. D., Sukovatiy A. G., Shishatskaya E. I.
Заглавие
: Properties of a novel quaterpolymer P(3HB/4HB/3HV/3HHx)
Место публикации
: Polymer: Elsevier, 2016. - Vol. 101. - P.67-74. - ISSN 00323861 (ISSN),
DOI
10.1016/j.polymer.2016.08.048
Ключевые слова
(''Своб.индексиров.''): physicochemical and mechanical properties--polyhydroxyalkanoates--quaterpolymers--biocompatibility--cell culture--chain length--chains--decomposition--3-hydroxyhexanoate--degrees of
crystallinity
--elongation at break--physico-chemical and mechanical properties--polyhydroxyalkanoates--quaterpolymers--short chain lengths--thermal decomposition temperature--film preparation
Аннотация:
Cupriavidus eutrophus В10646 was used to synthesize a series of polyhydroxyalkanoate (PHA) quaterpolymers composed of the short-chain-length 3-hydroxybutyrate (3HB), 4-hydroxybutyrate (4HB), and 3-hydroxyvalerate (3HV) and the medium-chain-length 3-hydroxyhexanoate (3HHx). The molar fraction of 3HB in the quaterpolymers varied between 63.5 and 93.1 mol.%, 3HV – between 1.1 and 24.6 mol.%, 4HB – between 2.4 and 15.6 mol.%, and 3HHx – between 0.4 and 4.8 mol.%. The properties of PHA quaterpolymers were significantly different from those of the P(3HB) homopolymer: they had much lower degrees of
crystallinity
(up to 30–45%), and lower melting points and thermal decomposition temperatures, with the interval between these temperatures remaining practically unchanged. Films prepared from PHA quaterpolymers were rougher and more porous than P(3HB) films; they showed higher values of elongation at break (up to 6–113%), i.e. were more elastic. Films prepared from PHA quaterpolymers were biocompatible and had no toxic effect on mouse fibroblast NIH 3T3 cells. © 2016 Elsevier Ltd
Смотреть статью
,
Scopus
,
WOS
,
Читать в сети ИФ
Найти похожие
3.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Ertiletskaya N. L., Sukhanova A. A., Boyandin A. N., Shalygina T. A., Kozyr O. A., Vasiliev A. D.
Заглавие
: Study of the effect of modified montmorillonite as a filler on the properties of composite granules based on polycaprolactone
Место публикации
: Tech. Phys. Lett. - 2022. - Vol. 48, Is. 3. - P.59-61. - ISSN 10637850 (ISSN),
DOI
10.21883/TPL.2022.03.53527.19055. - ISSN 10906533 (eISSN)
Примечания
: Cited References: 10. - This research was funded by the grant ”Ecological products with prolonged release of biologically active substances for potato nematode control“ MK-4374.2021.5 No. 075-15-2021-059 dated 16.04.2021
Аннотация:
The paper presents the results of a study of the effects of the "Monament-101" filler and the method of obtaining on the properties of composite granules based on polycaprolactone (PCL). DSC and X-ray diffraction analysis showed an increase in the degree of
crystallinity
from 52 to 67% and a slight decrease in the melting point (by 2°C) as the clay was introduced into the polymer.
Смотреть статью
Найти похожие
полный формат
краткий формат
все найденные
отмеченные
кроме отмеченных
Стандартный
Расширенный
Профессиональный
Распределенный
По словарю
ГРНТИ-навигатор
УДК-навигатор
Тематический навигатор
Другие библиотеки
Центральная Научная Библиотека КНЦ СО РАН
Библиотека института биофизики
Библиотека института химии и химический технологии
Библиотека института вычислительного моделирования
Библиотека института леса
Библиотека СФУ
Краевая научная библиотека
© Международная Ассоциация пользователей и разработчиков электронных библиотек и новых информационных технологий
(Ассоциация ЭБНИТ)