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Highly Active Yttrium and Lanthanide Catalysts for Polymerization of Isobutene

✍ Scribed by Virginie Touchard; Roger Spitz; Christophe Boisson; Marie-France Llauro

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
147 KB
Volume
25
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Summary: Highly active catalysts for isobutene polymerization were obtained by mixing silica with yttrium or lanthanide chloride salts. Solid catalysts were investigated using transmission electron microscopy and Raman spectroscopy. Both Lewis and Brönsted acid sites were detected on the surface. Polymers of low and medium molecular weight were prepared and their unsaturated chain ends were fully investigated by one‐ and two‐dimensional NMR analyses.

^13^C NMR spectrum of a low‐molecular‐weight polyisobutene (high‐field resonance region).

image^13^C NMR spectrum of a low‐molecular‐weight polyisobutene (high‐field resonance region).

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