Poly(4-vinylpyridine)/silica (PVP/SiO~2) organic-inorganic nanoscale hybrid was prepared using sol-gel method, in which PVP was used as CpTiCl~3 support. The XPS and IR measurements showed that two kinds of catalytic active site were formed through analyzing the interaction mode between support and CpTiCl~3. The results of styrene polymerization showed that syndiotactic was the highest at 50℃ . The catalytic activity was 1.09×10^6 g PS/(mol Ti·h) at 70℃ when n(Al) /n(Ti)=1500. GPC results showed a bimodal molecular weigth distribution.

Key words: POLYVINYL PYRIDINE, SILICON DIOXIDE, NANOPHASE MATERIALS, TITANIUM COMPLEX, METALLOCENES, HYBRID MATERIALS, CARRIERS, STYRENE, POLYMERIZATION