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Stereospecific polymerization of styrene using a homogeneous lanthanide catalyst

✍ Scribed by Li Liu; Zhi Gong; Yulian Zheng; Xiabin Jing

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
233 KB
Volume
18
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Stereospecific polymerization of styrene was catalyzed by homogeneous neodymium phosphonate [Nd(P~507~)~3~]‐H~2~O‐Al(i‐Bu)~3~ catalytic system. The polymer was separated into isotactic polystyrene and atactic polystyrene by extracting the latter with boiling 2‐butanone. The conversion of styrene and the yield of isotactic polystyrene (IY) were influenced by the [H~2~O]/[Al(i‐Bu)~3~] mole ratio and the solvent polarity. The reaction is first order with respect to monomer at 70Β°C.

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