Huang Qigu

The investigation of terpolymerization of ethylene/propylene/ω-cl-α-vinyl monomers catalyzed by Cat.L-Pd catalyst

We investigated the terpolymerization of ethylene/propylene/ω-Cl-α-vinyl monomers to obtain polar terpolymers by non-metallocene catalyst Cat.L-Pd through coordination polymerization directly. The functional ω-Cl-α-vinyl monomer inserted into the polymeric molecules changed the properties of the obtained polymers. The optimum catalyst Cat.L-Pd and polymerization conditions were optimized for the terpolymerization. The structure and properties of the terpolymers were characterized by FTIR, 13C (1H) NMR, DSC and GPC. The optimum incorporation content of 11-chloro-1-undecylene within the terpolymer chains is up to 3.58 mol%. The polar monomers did not carry out the homopolymerization itself, but efficiently joined the terpolymerization with ethylene and propylene. Propylene monomer was in favor of the copolymerization with ethylene beside its homopolymerization. But polypropylene segments were not observed within the terpolymer chains. Compared to the polar monomers and propylene, ethylene was the most efficient monomer for joining the terpolymerization of ethylene/propylene/ω-Cl-α-vinyl monomers, and longer segments of polyethylene were produced within the terpolymer chains. M w up to 2×105 g/mol of the terpolymers was obtained by the catalyst system. The terpolymer molecular weight distribution (MWD) was about 2 to 3, implying the terpolymerization behavior followed the single-site mechanism.