Kinetic and UV−Visible Spectroscopic Studies of Hex-1-ene Polymerization Initiated by an α-Diimine-[N,N] Nickel Dibromide/MAO Catalytic System
作者： Frédéric Peruch , Henri Cramail , Alain Deffieux
DOI: 10.1021/MA990530J
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摘要: A study of the elementary reactions involved in catalytic activation process α-diimine NiBr2 by methylaluminoxane (MAO), for α-olefins polymerization, was undertaken toluene and chlorobenzene as solvents. The investigation is based on comparative polymerization kinetics hex-1-ene, UV−visible spectroscopic analysis system structural poly(hex-1-ene)s formed. Correlation between activities changes absorption spectrum transition metal derivative were found. Spectroscopic data have underlined important role monomer stabilization nickel-based active species. Partial orders with respect to MAO, nickel determined. Surprisingly, an apparently negative order corresponding a decrease rate increase concentration reacting medium observed. tentative inte...
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