Various silyl-substituted cyclopentadienyl titanium complexes [CpSi(CH3)2X]TiCl3 as catalysts for syndiotactic polystyrene |
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| Authors: | Xueqin Sun |
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| Institution: | Laboratory of Organometallic Chemistry, East China University of Science and Technology, 130 Meilong Road, 200237 Shanghai, PR China |
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| Abstract: | Three silyl-substituted titanium trichloride complexes CpSi(CH3)2X]TiCl3 X=Cl(1), Me(2), PhOMe(3)] were tested as catalyst precursors for the syndiospecific polymerization of styrene. The catalytic activity increased in the order 1 > 2 > 3. The highest activity was 2.42 × 107 g s-PS/mol Ti mol S h using complex 1/MAO catalytic system at molar ratio of Al/Ti=2000. The effects of variation on polymerization temperature and Al/Ti ratio on the polymerization of styrene were also studied. |
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| Keywords: | Half-sandwich titanocene Syndiotactic polystyrene Silyl-substituent |
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