【摘 要】
：
A new kind of zirconium(Zr) complex containing ligand of salicylaldehyde-imine was suc-cessfully synthesized with ZrCl4·2THF and salicylaldehyde-imine as raw materials. The ligand was character-ized by means of 1HNMR, IR, and GC-MS, and Zr complex was cha
【机 构】
：
School of Chemisty and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 43008
【出 处】
：
武汉理工大学学报（材料科学版）（英文版）
论文部分内容阅读
A new kind of zirconium(Zr) complex containing ligand of salicylaldehyde-imine was suc-cessfully synthesized with ZrCl4·2THF and salicylaldehyde-imine as raw materials. The ligand was character-ized by means of 1HNMR, IR, and GC-MS, and Zr complex was characterized by means of 1HNMR and IR, respectively. The Zr complex, combined with co-catalyst of Al(i-Bu)3, was explored to be effective catalytic sys-tem for the polymerization of butyl methacrylate(BMA), to prepare poly-n-butyl methacrylate (PBMA), which was characterized by IR, 13C-NMR and GPC. Compared with other double-component (MAO/Cat, AlEt3/Cat) catalytic systems, catalytic system of Al(i-Bu)3 and the Zr complex provided the best catalytic activity under the same conditions. The influence of polymerization parameters, such as molar ratio of Al(i-Bu)3/Cat and BMA/Cat, polymerization temperature and polymerization time, was studied with Zr complex/ Al(i-Bu)3 system. With increasing polymerization time from 4 to 24 hour, the monomer conversion increased from 40.14％ to 96.56％. Viscosity-average molecular weight (Mv) of PBMA, detected by the viscosity methodology, increased from 12.67×104 Da to 44.97×104 Da and lower molecular weight distribution was obtained. According to these results, the Zr complex contained ligand of salicylaldehyde-imine was a kind of readily, long lifetime and high activity catalyst for BMA polymerization.
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