|
ИСТИНА |
Войти в систему Регистрация |
ИПМех РАН |
||
Synthesis and Gas-Transport Properties of Metathesis Polytricyclononenes Bearing Three Me3Si Groups per Monomer Unitстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 25 апреля 2017 г.
- Авторы: Chapala P., Bermeshev M., Starannikova L., Borisov I., Shantarovich V., Lakhtin V., Volkov V., Finkelshtein E.
- Журнал: Macromolecular Chemistry and Physics
- Том: 217
- Год издания: 2016
- Издательство: John Wiley & Sons Ltd.
- Местоположение издательства: United Kingdom
- Первая страница: 1966
- Последняя страница: 1976
- DOI: 10.1002/macp.201600232
- Аннотация: A new metathesis polynorbornene containing three SiMe3 groups per monomer unit directly connected to the norbornene moiety via SiC bonds is synthesized. The ring-opening metathesis polymerization of sterically hindered 3,3,4-tris(trimethylsilyl)tricyclononene-7 is successfully conducted in yields 80–85% in the presence of first generation Grubbs catalyst. The corresponding polymer is obtained with molecular weight Mw up to 5.4 × 105 Da. It is an amorphous glassy (Tg = 200 °C) polymer with high thermal stability. Gas permeability and diffusivity coefficients are studied for a range of gases (He, H2, O2, N2, CO2, CH4). This polymer containing three SiMe3 groups per monomer unit turns out to be more permeable (P(O2) = 125 Barrer) than similar polymers with one or two SiMe3 groups per monomer unit (P(O2) = 30–50 Barrer). Wide angle X-ray diffraction, positron annihilating lifetime spectroscopy, as well as Brunauer–Emmett–Teller investigations are also performed and discussed.
- Добавил в систему: Борисов Илья Леонидович