Synthesis of New Materials Using Organometallics

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1) Synthesis of Monodisperse High Molecular Polymers by the Catalysis of Organo Rare Earth Metal Complexes : when [(SiMe3) 3C] 2Yb was used as initiator, highly isotactic polymer of methyl methacrylate with high molecular weight and low polydispersity was obtained in high yield. The mixing og the resulting isotactic polymers with high syndiotactic poly (methl methacrylate) produces stereocomplexes, which show high temperature as 220-260ﾟC.The copolymerization of caprolactone with optically active 1-methyltorimethylenecarbonate or 1,3-dimethyltorimethylenecarbonate using SmMe (C5Me5) 2 (THF) gave desired copolymers of high molecular weight and low polydispersity.2) Synthesis and Property of Mesoporous Activated Carbon fiber : Steam invigoration of the carbon fiber containing Y (acap) 3 (0.3 wa%) produces mesoporous carbon fiber whose pore diameter is >20 *. the adsorption behaivior of giant molecules such as direct dyes, acidic or basic dies show that direct dies adsorps direct Black 19 and Direct Yellow 12 very well.3) Synthesis of New Type of Biodegradable Polymers : Copolymerization of dipsipeptides with caprolactone using organometallic initiators gave biodegradable polymers which show high degradability using several enzymes and activated sludge. Coplymerization of opticaally active 1-methyl and 1,3-dimethyltrimethylene carbonates with caprolactone also gave the biodegradable polymers.