1-Butene was polymerized with highly active supported titanium catalysts which was developed in this laboratory. The influences of various conditions such as catalyst composition

temperature

triethylaluminum concentration

catalyst concentration

adding ester and H2 on the catalytic activity

decay of polymerization rate

inh value and isotactivity of resulting products were studied in detail. The structure and properties of poly (1-butene) were also studied by WAXD

DSC and 13C-NMR.It was found that TiCl4

Ti (OBu)4/MgCl2/ethylbenzoate (EB)/(C6H5)2SiCl2/AlEt3 catalyst had high catalytic activity

i.e. 3.2×104g.PB/g.Ti.h Isotacticity of ploducts was increased by adding P-CH3H6H4COOEt. i.e. I. I. %= 93.3.Molecular weight ofproducts was controlled by H2.The decay of polyme-rization rate with time fulfills the equation:Rt-Rs=(Ro-Rs)e-βt.