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Copolymerization of Ethylene with ω‐Unsaturated Fatty Acid Methyl Esters Using a Cationic Palladium Complex
Author(s) -
Warwel Siegfried,
Wiege Berthold,
Fehling Eberhard,
Kunz Michael
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20010301)202:6<849::aid-macp849>3.0.co;2-8
Subject(s) - comonomer , cationic polymerization , ethylene , copolymer , polymer chemistry , chemistry , palladium , catalysis , polystyrene , polymer , organic chemistry
The copolymerization of ethylene with ω‐unsaturated fatty acid methyl esters with chain length of C 6 , C 7 , C 10 , C 11 and C 14 I a – e using the cationic palladium catalyst {[(2,6‐ i ‐PrPh) 2 DABMe 2 ]Pd[(CH 2 ) 3 COOMe]}SbF 6 ( II ) (DAB: diazabutadiene) was investigated. The effects of temperature, ethylene pressure and comonomer concentration were studied conducting the copolymerization of ethylene and 9‐decenoic acid methyl ester as a standard reaction. Branched functionalized polyolefins were produced with molecular weights up to 85 000 g/mol ( M̄ w ) as determined by GPC versus polystyrene calibration standards. Maximum incorporation of polar comonomer of 31 wt.‐% were achieved and a maximum ester turnover number (TON ester ) of 223. Polymers exhibited viscoelastic properties with glass transition temperature of –65 to –55°C.