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Stereospecific polymerization of styrene using a homogeneous lanthanide catalyst
Author(s) -
Liu Li,
Gong Zhi,
Zheng Yulian,
Jing Xiabin
Publication year - 1997
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.1997.030180914
Subject(s) - polystyrene , styrene , tacticity , polymer chemistry , polymerization , stereospecificity , monomer , catalysis , materials science , copolymer , polymer , yield (engineering) , chemistry , organic chemistry , composite material , metallurgy
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 70°C.