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Highly Stereoregular Polymerization of 1,3‐Cyclohexadiene in the Presence of Cp 2 Ni‐MAO Catalyst
Author(s) -
Longo Pasquale,
Freda Cesare,
Ruiz de Ballesteros Odda,
Grisi Fabia
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(20010201)202:3<409::aid-macp409>3.0.co;2-7
Subject(s) - methylaluminoxane , polymer chemistry , polymerization , melting point , catalysis , polymer , cyclopentadienyl complex , materials science , monomer , metallocene , chemistry , organic chemistry
Polymerizations of 1,3‐Cyclohexadiene, in the presence of Cp 2 Ni (Cp = cyclopentadienyl) activated by methylaluminoxane (MAO), were carried out at different temperatures and Ni‐MAO mole ratios. The polymers obtained are stereoregular with a 1–4 structure, and are highly crystalline with a melting point close to 315°C. Copolymerizations of 1,3‐cyclohexadiene and butadiene with the title catalyst give polymers with a nearly random distribution of the comonomeric units.