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Stereospecificity of catalytic systems MCl3AlEt3 in propylene polymerization reactions

✍ Scribed by L.A. Rishina; Yu.V. Kissin; F.S. Dyachkovsky

Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
177 KB
Volume
12
Category
Article
ISSN
0014-3057

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✦ Synopsis

Stereoregularity parameters are measured by different i.r. methods for samples of polypropylene, obtained with catalytic systems MC13-AIEt 3 (M = Ti, V, Cr and Fe). The degree of stereoregularity of the fractions of these polymers insoluble in boiling n-heptane and n-octane decreases in the order :~-TiC13 ~-f-TiC13 > CrC13 > VCI 3 > FeCI3 which is close to the order of the decrease of M-C1 and M-M distances in the MCI 3 lattices.

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