Tailoring the Metallocene Structure To Obtain LLDPE by Ethene Homopolymerization: An Experimental and Theoretical Study
摘要:
The mechanism of formation of branched polyethylene in the polymerization promoted by meso-metallocene/MAO systems has been investigated by combining DFT calculations and experimental results on differently featured meso-zirconocenes. A possible explanation for the required meso structure in the formation of branches considers a competition of ethene insertion and beta-hydrogen transfer to the monomer. General mechanistic considerations in order to design catalytic systems able to synthesize LLDPE by ethene homopolymerization have been outlined.
Tailoring the Metallocene Structure To Obtain LLDPE by Ethene Homopolymerization: An Experimental and Theoretical Study
摘要:
The mechanism of formation of branched polyethylene in the polymerization promoted by meso-metallocene/MAO systems has been investigated by combining DFT calculations and experimental results on differently featured meso-zirconocenes. A possible explanation for the required meso structure in the formation of branches considers a competition of ethene insertion and beta-hydrogen transfer to the monomer. General mechanistic considerations in order to design catalytic systems able to synthesize LLDPE by ethene homopolymerization have been outlined.