Реферат: The propagation rate constant Kp was used as a measure of reactivity of propagation centers in ethylene polymerization with oxide catalysts. This constant was determined by a radiotracer quenching technique for oxide catalysts of different compositions and activation conditions. For catalysts based on various transition metal oxides, an increase of Kp was observed in the series W < Mo < Cr and V < Cr. In the case of chromium oxide catalyst it was shown that Kp value does not depend on the content of the transition metal in a catalyst. A change of propagation center reactivity was found when oxides of different composition (SiO2, Al2O3, ZrO2, TiO2) were used as supports. An increase of the vacuum activation temperature of a catalyst results in increasing Kp. Pretreatment of catalyst with different reducing agents (SO2, CO2, NH3, HCN) results in the change of Kp value in comparison with the catalyst activated by the vacuum treatment only. The data obtained on the variation of the reactivity of the propagation centers permit one to draw a conclusion about the composition of surface compounds as active centers of the oxide polymerization catalysts.

Библиографическая ссылка: Ermakov Y.I. , Zakharov V.A. , Kushnareva E.G.
Dependence of Reactivity of Propagation Centers of Oxide Catalysts for Ethylene Polymerization on Catalyst Composition and Activation Conditions
Journal of Polymer Science, Part A: Polymer Chemistry. 1971. V.9. N3. P.771-784. DOI: 10.1002/pol.1971.150090315 WOS РИНЦ CAPlusCA OpenAlex

Даты:

Поступила в редакцию:	2 окт. 1969 г.
Принята к публикации:	30 дек. 1970 г.
Опубликована в печати:	1 мар. 1971 г.
Опубликована online:	10 мар. 2003 г.

Идентификаторы БД:

Web of science:	WOS:A1971J033400015
РИНЦ:	29818458
Chemical Abstracts:	1971:406483
Chemical Abstracts (print):	75:6483
OpenAlex:	W2164196901

Цитирование в БД:

БД	Цитирований
Web of science	10
РИНЦ	9
OpenAlex	12

Альметрики: