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Heterocene-catalyzed ethylene/oct-1-ene copolymerization under MAO-free and low-MAO conditions: The synthesis of highly statistical copolymers and their use in blending with HDPEстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 26 июня 2024 г.
- Авторы: Nifantev Ilya E., Vinogradov Alexander A., Minyaev Mikhail E., Bagrov Vladimir V., Salakhov Ildar I., Shaidullin Nadim M., Chalykh Anatoly E., Shapagin Alexey V., Ivchenko Pavel V.
- Журнал: Polymer
- Том: 272
- Год издания: 2023
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 125836
- DOI: 10.1016/j.polymer.2023.125836
- Аннотация: Sandwich SiMe2-bridged ansa-complexes of zirconium, containing heterocycle-fused η5-cyclopentadienyls, derivatives of 2,5-dimethyl-7H-cyclopenta[1,2-b:4,3-b’]dithiophene (2), 5,10-dihydroindeno[1,2-b]indole (3) and 5,6-dihydroindeno[2,1-b]indole (4) – ’heterocenes’ – catalyzed ethylene homopolymerization and ethylene/oct- 1-ene (E/O) copolymerization in the presence of triisobutylaluminum (TIBA) without MAO and perfluoroaryl borate activators, the benchmark bis(η5-fluorenyl) complex 1 was virtually inactive under these conditions. In the absence of MAO, E/O copolymerization resulted in a formation of copolymers not containing EOOE fragments even at E/O ratio of 2.4. Addition of 10 eq. of MMAO-12 resulted in increase of both catalytic activities of 2–4 and oct-1-ene incorporation. E/O copolymers POE-05 (obtained on TIBA activated precatalyst 2) and POE- 17 (obtained on TIBA/MMAO-12 activated precatalyst 4) were not inferior to the best commercial E/O copolymers in physico-mechanical characteristics at 45 ◦C. Extrusion blends of POE-05 and POE-17 with high density polyethylene (HDPE) demonstrated high impact strength and frost resistance.
- Добавил в систему: Нифантьев Илья Эдуардович