Several functional polystyrene-supported metal (Ru, Rh, Pd) catalysts were synthesized. The hydrogenation selec-tivity of these catalysts for polyunsaturated cycloolefines (1,5,9-cyclododecatriene, cyclopentadiene) and unsaturated carbonyl compounds (mesityl oxide, crotonaldehyde acrylic aldehyde) was investigated. Some important factors (pore size, crosslinkage of polymer supports, donor atoms and substituents thereon) for the tailoring of supports and ligands which have great influence over the hydrogcnation selectivity of the supported metal catalysts are discussed.

Ring-opening metathesis polymerization (ROMP) of dicyclopentadiene (DCPD) was carried out by using (ArO)6-xWClx-Et2A1C1 (ArO: 2,6-ditertiarybutyl-p-cresoxy, x=3, 4, 6) and the corresponding polymer-supported catalytic systems. Influences of different homogeneous catalysts, polymerization conditions and immobilization of the homogeneous catalytic systems on polymerization (gelation time, monomer conversion) and synthesized polydicyclopen-tadiene's (PDCPD's) mechanical properties were investigated. The experimental results show that using the polymer-supported catalytic systems can not only increase the monomer conversion of polymerization but also improve the synthesized polymer's mechanical properties to a certain extent.

Ring-opening metathesis polymerization (ROMP) of dicyclopentadiene (DCPD) was conducted by using catalyst systems WCl6-Et2AlCl, (WCl6-PhCOMe)-Et2AlCl and their polystyrene supported counterparts. Experimental results indicate that the acetophenone modified catalyst system shows better catalytic properties than the unmodified system does and that supporting the catalysts on a polystyrene can improve further the catalyst systems'catalytic properties. As a result, the polymer yield of the ROMP increased, the mechanical properties of NIS (notched impact strength), TS (tensile strength) of synthesized polydicyclopentadiene (PDCPD) enhanced. The mechanism in which supporting improves the properties of the catalyst systems is discussed.

The macroligand effect of the catalytic system WCl6-Et2AlCl for ring opening metathesis polymerization (ROMP) of dicyclopentadiene (DCPD) was investigated. The experimental results show that macroligand effect varies with the structure of the ligands. The macroligands bearing benzene group and steric hindered phenolic unit not only can obviously increase the yield of synthesized polydicyclopentadiene (PDCPD) but also improve the synthesized polymer's mechanical properties. The mechanism of macroligand effect is discussed. The synthesized PDCPD was characterized by methods of scanning electron microscopy (SEM) and X-ray diffraction.

The Diels-Alder reaction of cyclopontadione (CPD) and allyl chloride (AC) was carried out by using BF3