A novel highly active catalyst of TiCl4/MgCl2--Al(C2H5)
system (called SN-1 catalyst
in whichrare earth compound NdCl3
is included) was used for studying stereospecific polymerization of styrenein benzene solution. Highly isotactic polystyrene was prepared with far better yield and higher cataly-tic efficiency than the results ever reported in literatures. The influences of concentration of mono-mer
catalyst
triethyaluminum as well as polymerization temperature on the catalytic efficiency
yield
tacticity and molecular weight of polystyrene have been investigated.
Abstract
A novel highly active catalyst of TiCl4/MgCl2--Al(C2H5)
system (called SN-1 catalyst
in whichrare earth compound NdCl3
is included) was used for studying stereospecific polymerization of styrenein benzene solution. Highly isotactic polystyrene was prepared with far better yield and higher cataly-tic efficiency than the results ever reported in literatures. The influences of concentration of mono-mer
catalyst
triethyaluminum as well as polymerization temperature on the catalytic efficiency
yield
tacticity and molecular weight of polystyrene have been investigated.
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