Ethylene Polymerization by a Novel Dinuclear Heteroligated Titanium Complex with the Ligand of (Salicylaldiminato)(β-enaminoketonato)

武汉理工大学学报-材料科学版(英文版), 2008, 23(6): 821-824. doi: 10.1007/s11595-007-6821-4

^1, , ^2, , ^3, , ^4,

1.Department of Chemical Engineering Institute of United Chemical Reaction Engineering,College of Material and Chemical Engineering,Zhejiang University,Hangzhou 310027,China

2.Department of Chemical Engineering Institute of United Chemical Reaction Engineering,College of Material and Chemical Engineering,Zhejiang University,Hangzhou 310027,China

3.Department of Chemical Engineering Institute of United Chemical Reaction Engineering,College of Material and Chemical Engineering,Zhejiang University,Hangzhou 310027,China

4.Department of Chemical Engineering Institute of United Chemical Reaction Engineering,College of Material and Chemical Engineering,Zhejiang University,Hangzhou 310027,China

基金项目: 国家自然科学基金(20374043)

Ethylene Polymerization by a Novel Dinuclear Heteroligated Titanium Complex with the Ligand of (Salicylaldiminato)(β-enaminoketonato)

NIE Yujing ^1, , SUN Junquan ^2, , CHENG Zhengzai ^3, , WANG Lineai ^4,

1.Department of Chemical Engineering Institute of United Chemical Reaction Engineering,College of Material and Chemical Engineering,Zhejiang University,Hangzhou 310027,China

2.Department of Chemical Engineering Institute of United Chemical Reaction Engineering,College of Material and Chemical Engineering,Zhejiang University,Hangzhou 310027,China

3.Department of Chemical Engineering Institute of United Chemical Reaction Engineering,College of Material and Chemical Engineering,Zhejiang University,Hangzhou 310027,China

4.Department of Chemical Engineering Institute of United Chemical Reaction Engineering,College of Material and Chemical Engineering,Zhejiang University,Hangzhou 310027,China

Keywords： ethylene polymerization

The condensation of acetylacetone (CH3COCH2COCH3) with benzdine(H2N-C6H4-C6H4-NH2) yielded diimine ligand 1 [HOC(Me)C(H)(Me)C=N(p-C6H4)(C6H4-p)N=C(Me)C(H)C(Me)OH)],which was converted into sodium salts.And then the sodium salts reacted with monosalicylaldiminato titanium complex 2{[3,5-di-Bu'-240)C6H2CHN(PH)]TiCl3(THF)} in dried dichloromethane to give a new benzdine-bridged binuclear complex 3{[3,5-di-Bu'-2-(O)C6H2CHN(PH)]2[OC(Me)C(H)(Me)C=N(p-C6H4)-(C6H4-p)N=C(Me)C(H)C(Me)]Ti2Cl4}.The complex 3 was characterized by 1HNMR and elemental analysis.In the presence of MAO(methylaluminoxane),the complex 3 in toluene was effective to catalyze polymerization,affording moderately high catalytic high temperature gel permeation chromatography (GPC) curve of polyethylene obtained revealed a single peak,but the molecular weight distribution (MWD=3.21) is obviously broader than that of the similar mononuclear titanium complex.The melting points of the obtained polyethylene reaches 138 ℃,indicating that the polyethylene is of high crystallinity.

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材料期刊网

Ethylene Polymerization by a Novel Dinuclear Heteroligated Titanium Complex with the Ligand of (Salicylaldiminato)(β-enaminoketonato)

参考文献