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Styrene/(Styrene Derivative) and Styrene/(1‐Alkene) Copolymerization using Ph 2 Zn‐Additive Initiator Systems
Author(s) -
Rabagliati Franco M.,
Cancino Rodrigo A.,
Pérez Mónica A.,
Rodríguez Francisco J.
Publication year - 2004
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200451207
Subject(s) - styrene , copolymer , polystyrene , polymer chemistry , alkene , polymerization , materials science , metallocene , derivative (finance) , monomer , chemistry , polymer , organic chemistry , catalysis , economics , financial economics
Diphenylzinc‐metallocene‐MAO initiator systems have proven to be effective initiator systems for styrene and for substituted styrenes as well as for their styrene/(styrene‐derivative) copolymerization. Titanocene produced almost pure syndiotactic polymers while zirconocenes gave atactic polystyrene together with a low content, less than 20%, of syndiotactic polystyrene. Systems including a zirconocene, particularly ethenyl(bisindenyl)zirconium dichloride were effective initiators of 1‐alkene polymerization and of styrene/1‐alkene copolymerization. Conversion to polymer increases with the molecular size of 1‐alkene. Styrene derivative and styrene/(styrene derivative) polymerization was greatly influenced by the inductive effect of substituent and by steric hindrance due to the monomer.