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Synthesis, structure, and properties of syndiotactic polystyrene catalyzed by Cp*Ti(OBz) 3 /MAO/TIBA
Author(s) -
Huang Qigu,
Sheng Yaping,
Yang Wantai
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.25080
Subject(s) - tacticity , polystyrene , polymerization , polymer chemistry , polymer , catalysis , materials science , melting point , solvent , toluene , molar mass distribution , chemistry , organic chemistry , composite material
The synthesis of syndiotactic polystyrene (sPS) catalyzed with Cp*Ti(OBz) 3 /MAO/TIBA and toluene as the solvent and the effects of polymerization temperature and the external addition of TIBA on polymerization behavior were investigated. The study revealed that catalytic activity increased with polymerization temperature. The greatest activity, 619 kg sPS mol −1 Ti h −1 , was exhibited up to 90°C. TIBA also improved catalytic activity. The molecular weight of the polymer obtained decreased with polymerization temperature and the amount of TIBA. The structure and properties of syndiotactic polystyrene were characterized by 13 C‐NMR, FTIR, DSC, and GPC methods. It was confirmed that the sPS obtained featured all‐trans planar zigzag conformation and higher syndiotacticity, molecular weight, and melting point. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 501–505, 2007