Abstract: Because the insertion of CO into Ti-​C bonds proceeds slowly, information for the detn. of the no. of propagation centers in Ti chloride-​based polymn. catalysts can only be obtained by using radioactive CO. The main criterion for the quant. detn. of the no. of propagation centers is the independence of the detd. value of the rate const. when using several inhibitors of different types or when varying the conditions of the inhibition with one inhibitor. For catalysts based on TiCl2, the no. of radioactive tags in the polymer detd. by using 14CO at small exposure values corresponds to the no. of propagation centers. For catalysts based on TiCl3, the insertion of the 1st 14CO into the Ti-​C bond was rapid enough for 5-​10 min but further increase in the no. of tags in the polymer was due either to slow copolymn. of CO with monomer or to the regeneration of the active bond by organoaluminum compd.

Cite: Bukatov G.D. , Zakharov V.A. , Yermakov Y.I.
Application of 14CO to Determination of the Number of Active Centers in Ziegler-Natta Polymerization of Olefins
Macromolecular Chemistry and Physics. 1978. V.179. N8. P.2097-2101. DOI: 10.1002/macp.1978.021790825 WOS РИНЦ ANCAN OpenAlex

Dates:

Submitted:	May 17, 1978
Published print:	Aug 1, 1978
Published online:	Mar 12, 2003

Identifiers:

Web of science:	WOS:A1978FP36500025
Elibrary:	27479916
Chemical Abstracts:	1978:510588
Chemical Abstracts (print):	89:110588
OpenAlex:	W1917497134

Citing:

DB	Citing
Web of science	36
Elibrary	26
OpenAlex	41

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