Abstract
A silica-supported titanium(IV) complex (I) bearing [O−NS] tridentate ligand was prepared for the first time. Its performance in ethylene homo- and copolymerization with 1-hexene were studied. The effects of various polymerization conditions including Al/Ti molar ratio, temperature, ethylene pressure and the mixture of modified methylaluminoxane (MMAO) and triethylaluminum (AlEt3) as cocatalyst on the catalytic activities and properties of the obtained polymer were investigated. The results showed that the good catalytic activities and incorporation of 1-hexene in copolymer can be reached. Ethylene polymerization with such supported catalyst system gave polymers with higher molecular weight, higher melting temperature and better morphology than those obtained with the corresponding homogeneous catalyst.
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