Untersuchungen zur synthese von poly(butadien-co-propylenoxid) mit einem ziegler-natta-titankatalysatorsystem

After comparison of three catalyst systems, i.e. Nd(Oct)₃/Al₂Cl₃ET₃/Al(i-But)₃, Ni(Oct)₂/BF₃OEt₂/AlEt₃ and Al(i-But)₃/I₂/TiCl₄] the titanium catalyst system was used for the copolymerization of 1,3-butadiene with propylene oxide. The effects of monomer ratio on copolymer composition, conversion, microstructure, molar mass and molar mass distribution as well as of time of polymerization and of the aluminium/titanium ratio were evaluted. The copolymerization parameters were determined according to Kelen-Tüd?s as r_butadiene = 0,9 and r_{propylene oxide} = 3,9. Copolymerization was confirmed by ¹³C NMR spectroscopy and extract evaluation combined with ¹H NMR spectroscopy.