2007•Macromolecular Chemistry and PhysicsRequires access

Tailored Branched Polyolefins by Metallocene Catalysis

Walter Kaminsky, Matthias Hoff, Stefanie Derlin

Abstract

Abstract Metallocene/methylaluminoxane catalysts are able to design copolymers with tailored architectures. It is possible to copolymerize ethene with higher α‐olefins and cyclic olefins. The terpolymer of ethene/1‐hexene/norbornene shows a better flexibility than the ethene/norbornene copolymer by a similar high transparency. The influence of the comonomer concentration on activity, molecular weight, and glass transition temperature is given as well as the comparison to 1‐hexene/norbornene and propene/norbornene copolymers. Hexene/norbornene copolymers were found to have a predominant alternating microstructure. magnified image

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Key concepts: Norbornene, Methylaluminoxane, Comonomer, Metallocene, Copolymer, Polymer chemistry, Materials science, Propene