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Bulk propylene polymerization in the presence of ansa-metallocenes of C2 and C1 symmetries: from a rigid thermoplastic to elastomeric stereoblock polypropylene Научная публикация

Конференция International Olefin Polymerization Conference
22-25 июн. 2004 , Moscow
Журнал Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210
Вых. Данные Год: 2006, Том: 47, Номер: 2, Страницы: 245-250 Страниц : 6 DOI: 10.1134/S0023158406020145
Авторы Nedorezova P.M. 1 , Veksler E.N. 1 , Aladyshev A.M. 1 , Tsvetkova V.I. 1 , Optov V.A. 1 , Brusova G.P. 2 , Lemenovskii D.A. 2
Организации
1 Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, 117977, Russia
2 Moscow State University, Moscow, 117234, Russia
Реферат: Bulk propylene polymerization in the presence of ansa-metallocenes with C-2 and C-1 symmetries has been studied. The catalytic activity, polymerization kinetics, and the molecular weight of polypropylene (PP) depend strongly on catalyst formation conditions. Mixtures of rac and meso isomers of metallocenes make it possible to rapidly produce a high-molecular-weight isotactic PP with high stereoregularity and mechanical characteristics and thus skip the stage of the isolation of pure rac isomer in the catalyst synthesis. The ability of triisobutylaluminum to serve as a cocatalyst is studied for ansa-metallocenes of C-1 symmetry. In this case, the molecular weight of PP is higher, indicating that organoaluminum compounds participate in chain termination reactions. An increase in the reaction temperature results in an increase in the stereoregularity and crystallinity of PP. Polypropylene synthesized using ansa-metallocenes of C-1 symmetry has good elastomeric properties.
Библиографическая ссылка: Nedorezova P.M. , Veksler E.N. , Aladyshev A.M. , Tsvetkova V.I. , Optov V.A. , Brusova G.P. , Lemenovskii D.A.
Bulk propylene polymerization in the presence of ansa-metallocenes of C2 and C1 symmetries: from a rigid thermoplastic to elastomeric stereoblock polypropylene
Kinetics and Catalysis. 2006. V.47. N2. P.245-250. DOI: 10.1134/S0023158406020145 WOS Scopus РИНЦ CAPlus OpenAlex
Оригинальная версия: Недорезова П.М. , Векслер Э.Н. , Аладышев А.М. , Цветкова В.И. , Оптов В.А. , Брусова Г.П. , Леменовский Д.А.
Особенности полимеризации пропилена в массе при использовании анса-металлоценов C2- и C1-симметрии: от жесткого термопластика к эластомерному стереоблочному полипропилену
Кинетика и катализ. 2006. Т.47. №2. С.248-253. РИНЦ РЖ ВИНИТИ
Даты:
Поступила в редакцию: 8 авг. 2005 г.
Опубликована в печати: 1 мар. 2006 г.
Идентификаторы БД:
Web of science: WOS:000237036100014
Scopus: 2-s2.0-33745252810
РИНЦ: 13523369
Chemical Abstracts: 2006:407057
OpenAlex: W1995623482
Цитирование в БД:
БД Цитирований
Web of science 7
Scopus 6
OpenAlex 8
Альметрики: