Polymerization of methyl methacrylate with ethylene bridged heterodinuclear metallocene of samarium and titanium-study on synergism and kinetics |
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| Authors: | Sun Jun-quan Pan Zhi-da Hu Wei-qiu Yang Shi-lin |
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| Institution: | (1) College of Material Science and Chemical Engineering, Zhejiang University, 310027 Hangzhou, China |
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| Abstract: | Comparison of MMA polymerization results with samarocene chloride, titanocene chloride and the title heterodinuclear (Sm−Ti)
catalyst, respectively, showed synergism in the Sm-Ligand-Ti system, which obviously influenced the polymerization behaviors,
for example, of yeilding higher activity and higher molecular weight polymer. Kinetic studies on polymerization of MMA with
ethylene bridged samarocene and titanocene chloride/Al(i-Bu)3 showed that the polymerization rate was first-order on the catalyst concentration, and 1.9-order on the monomer. The overall
activation energy measured was 52.8 kJ/mol.
Project supported by NSFC (No. 20074028), and SINOPEC(X598037). |
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| Keywords: | heterodinuclear metallocene heterodinuclear synergism methyl methacrylate polymerization kinetics titanocene lanthanocene |
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