Copolymerization method of cycloolefin

Abstract

The invention provides a copolymerization method of cycloolefin. The reaction is carried out under the catalysis of a sulfur-containing ligand provided half-metallocene main catalyst shown as formula I and a methylaluminoxane cocatalyst. In formula I, X is alkyl or hydrocarbyloxy; Cp' is alkyl substituted or unsubstituted cyclopentadienyl, indenyl or fluorenyl. The catalyst can be used for catalyzing cycloolefin polymerization so as to obtain polycycloolefin, especially for catalyzing the addition polymerization of norbornene.

Description

technical field [0001] The invention belongs to the field of catalysis and olefin polymerization, and relates to a method for cyclic olefin polymerization, specifically, a mono-titanocene compound with a sulfur-containing ligand as the main catalyst and methylaluminoxane as a co-catalyst Catalyzed Cycloolefin Polymerization Process. Background technique [0002] Metallocene catalysts for olefin polymerization have been a research hotspot in organometallic chemistry, catalysis, polymer chemistry and materials science in recent decades. Metallocene catalysts in a broad sense include metallocene catalysts (double metallocene catalysts) and single metallocene catalysts. From another point of view, metallocene catalysts are divided into two types: bridged and non-bridged. Using generalized metallocene catalysts, olefin polymers with uniform molecular weight distribution and chemical composition distribution can be obtained; at the same time, the molecular structure and molecula...

AI Technical Summary

Problems solved by technology

[0009] However, when the bridged diphenol shown in chemical formula 3 is used as a bidentate ligand to synthesize a mono-titanocene compound for catalyzing ethylene polymerization, the catalytic activity is relatively low (Organometallics 2006, 25, 4358)

Images