THE INFLUENCE OF THE CATALYST PREPARATION ON THE HOMOMERIZATION AND COPOLYMERIZATION OF BUTADIENE AND ISOPRENE

Autor(en): OEHME, A
GEBAUER, U
GEHRKE, K
BEYER, P
HARTMANN, B
LECHNER, MD
Stichwörter: Polymer Science; POLYMERIZATION
Erscheinungsdatum: 1994
Herausgeber: HUTHIG & WEPF VERLAG
Journal: MACROMOLECULAR CHEMISTRY AND PHYSICS
Volumen: 195
Ausgabe: 12
Startseite: 3773
Seitenende: 3781
Zusammenfassung: 
The catalyst system Nd(octanoate)3/Al2Et3Cl3/Al(iBu)3 (Et: ethyl, iBu: isobutyl) in heptane for the polymerization of butadiene and isoprene was examined. The concentration of Al2Et3Cl3, Al(iBu)3 and the order of addition of the components were varied. The results of the determination of conversion, microstructure, molar mass and molar mass distribution are illustrated. The optimum component concentration ratio (Nd(octanoate)3/Al2Et3Cl3/Al(iBu)3 = 1 : 1,5 : 25) at a catalyst concentration of 1,0 mmol Nd/L was fixed and used for the copolymerization of butadiene and isoprene. Copolymers obtained under various monomer feed ratios were characterized by H-1, C-13 NMR spectroscopy, gel-permeation chromatography (GPC), and differential scanning calorimetry (DSC) investigations.
ISSN: 10221352
DOI: 10.1002/macp.1994.021951203

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