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Polyolefins with high glass transition temperatures
Author(s) -
Henschke Olaf,
Köller Frank,
Arnold Manfred
Publication year - 1997
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1997.030180712
Subject(s) - methylaluminoxane , norbornene , copolymer , glass transition , differential scanning calorimetry , polymer chemistry , metallocene , materials science , amorphous solid , ethylene , zirconium , catalysis , polymer , chemistry , organic chemistry , polymerization , composite material , physics , metallurgy , thermodynamics
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.