Polyolefins with high glass transition temperatures

Abstract

Abstract The copolymerization of propene and norbornene with the isospecific metallocene catalyst dimethylsilylenebis(η 5 ‐inden‐1‐yl)zirconium dichloride/methylaluminoxane ((CH 3 ) 2 Si[Ind] 2 ZrCl 2 /MAO) was investigated. Because of the surprisingly high reactivity of the cyclic olefin copolymers with a norbornene content of 11 mol‐% up to 98 mol‐% were synthesized. The resulting copolymers are amorphous. The glass transition temperatures studied by differential scanning calorimetry measurements increase with rising norbornene content in the copolymer. High glass transition temperatures of T g > 240°C were found for the copolymers with the highest content of norbornene.