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Copolymerization of 1,3-butadiene and styrene with a neodymium catalyst

✍ Scribed by Annekatrin Oehme; Ulrich Gebauer; Klaus Gehrke; M. Dieter Lechner

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
297 KB
Volume
16
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

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 60Β°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.

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