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Mao based catalysts for syndiotactic polystyrene (sPS)
Author(s) -
Campbell Richard E.,
Newman Thomas H.,
Malanga Michael T.
Publication year - 1995
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.19950970116
Subject(s) - metallocene , tacticity , catalysis , polystyrene , styrene , titanium , polymerization , polymer chemistry , molar ratio , materials science , copolymer , post metallocene catalyst , molar mass , ligand (biochemistry) , organic chemistry , chemistry , polymer , composite material , metallurgy , biochemistry , receptor
Several non‐metallocene (Ti, Zr) and substituted mono‐Cp titanium metallocenes have been tested in the presence of methylalumoxane (MAO) as catalyst for syndiospecific polymerization of styrene. Effect of substitutions on the titanium and Cp ligand, molar ratio of Al/Ti, TMA and temperature on activity, Mwt. and % sPS were studied. CpTi(OiPr) 3 gives a less active catalyst than Cp*Ti(OiPr) 3 and the resulting sPS is less stereoregular and of lower molecular weight.