METALLOCENE MAO POLYMERIZATION CATALYSTS SUPPORTED ON CYCLODEXTRIN

By treating cyclodextrin(CD) with methylaluminoxane (MAO such as PMAO or MMAO) or trimethylaluminium (TMA) followed by Cp(2)ZrCl(2), CD/PMAO/Cp(2)ZrCl(2), CD/MMAO/Cp(2)ZrCl(2) and CD/TMA/Cp(2)ZrCl(2) catalysts were prepared. The catalysts were analyzed by C-13-CP/MAS NMR spectrometer and ICP to examine the structure of catalyst and content of Zr and Al. Ethylene polymerization was conducted with MAO or TMA as cocatalyst. Styrene polymerization was also carried out with alpha-CD/MMAO/Cp(*)TiCl(3) and alpha-CD/TMA/Cp(*)TiCl(3) catalysts. While the ordinary trialkylaluminium such as TMA as well as MAO can be used as cocatalyst for ethylene polymerization, only MAO could initiate the styrene polymerization with alpha-CD supported catalysts.