Journal of Polymer Research

, Volume 16, Issue 2, pp 117–124 | Cite as

Influence of cocatalyst on the stereoselectivity and productivity of styrene polymerization reactions

  • Sutapa Ghosh


Influence of different cocatalysts on the polymerization reaction of styrene using heterogeneous nanoparticle NA-MgO and NA-TiO2 (anatase) supported bis (cyclopentadienyl) zirconium dichloride catalysts is studied. Methyaluminoxane, trityl tetrakis(pentafluorophenyl)borate(1), dimethylanilinium tetrakis (pentafluoro-phenyl)borate (2) and tris(pentafluorophenyl)borane (3) are used as cocatalysts for this study. The productivity and stereoselectivity of the catalysts systems are found to be highest with MAO and lowest with the borane 3 (MAO > 1> 2 > 3). Catalysts derived from the borane 3 yield amorphous atactic polystyrenes but those from cocatalysts MAO, 1, or 2 yield crystalline, syndiotactic polystyrenes under the same reaction conditions. Effects of addition of various scavengers and solvents with different polarities on styrene polymerizations are also reported here. Characterization of the obtained polymers is done by Gel Permeation Chromatography, 13C-NMR spectroscopy and Differential Scanning Calorimetry.


NA (Nano Active) Heterogeneous nanoparticle supported bis (cyclopentadienyl) zirconium dichloride catalyst Cocatalyst Polymerization Stereo regularity Atactic polymer Syndiotactic polymer 



We thank NFC, Hyderabad, India, for providing zirconium chloride.


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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Inorganic & Physical Chemistry DivisionIndian Institute of Chemical TechnologyHyderabadIndia

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