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Copolymerization of 1,3‐butadiene and styrene with a neodymium catalyst
Author(s) -
Oehme Annekatrin,
Gebauer Ulrich,
Gehrke Klaus,
Lechner M. Dieter
Publication year - 1995
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.1995.030160805
Subject(s) - copolymer , styrene , molar mass , monomer , polymer chemistry , gel permeation chromatography , polymerization , catalysis , polystyrene , materials science , solvent , polybutadiene , polymer , chemistry , organic chemistry , composite material
Homo‐ and copolymerization of butadiene and styrene in the presence of the catalyst system Nd(octanoate) 3 /CCl 4 /Al(iBu) 3 (iBu: isobutyl) were investigated at 60°C in heptane as solvent. The initiating catalyst system is very effective in the polymerization of butadiene. However, the presented copolymerization of butadiene and styrene is only practicable when using a special addition order of the catalyst components and a prescribed ageing phase. Copolymers obtained from various monomer feed ratios were characterized by 1 H and 13 C NMR spectroscopy and gel‐permeation chromatography (GPC). The copolymer characteristics especially microstructure, molar mass and molar‐mass distribution (MMD) are strongly dependent on the composition of the monomer mixture.