ETHYLENE/1-HEXENE COPOLYMERIZATION BY SALICYLALDIMINATO VANADIUM(Ⅲ) COMPLEXES ACTIVATED WITH DIETHYLALUMINUM CHLORIDE  

作　　者：李悦生 

机构地区：[1]State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry, Chinese Academy of Sciences

出　　处：《Chinese Journal of Polymer Science》2011年第5期627-633,共7页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.20734002)

摘　　要：Mono salicylaldiminato vanadium（Ⅲ） complexes （1a-1f） [RN = CH（ArO）]VC12（THF）2 （Ar = C6H4 （1a-1e）, R = Ph, 1a; R = p-CFaPh, 1b; R = 2,6-Me2Ph, 1c; R = 2,6-iPrEPh, 1d; R = eyclohexyl, 1e; Ar = C6HEtBU2（2,4）, R = 2,6-iPrEPh, 1f） and bis（salicylaldiminato） vanadium（III） complexes （2a-2f） [RN ： CH（ArO）]EVCI（THF）x （Ar = C6H4 （2a-2e）, x = 1 （2a-2e）, R = Ph, 2a; R = p-CF3Ph, 2b; R = 2,6-Me2Ph, 2c; R = 2,6-iPr2Ph, 2d; R = cyclohexyl, 2e; Ar = C6HEtBU2（2,4）, R = 2,6-iPrEPh, x = 0, 2f） have been evaluated as the active catalysts for ethylene/1-hexene copolymerization in the presence of Et2A1C1. The ligand substitution pattern and the catalyst structure model significantly influenced the polymerization behaviors such as the catalytic activity, the molecular weight and molecular weight distribution of the copolymers etc. The highest catalytic activity of 8.82 kg PE/（mmolv.h） was observed for vanadium catalyst 2d with two 2,6-diisopropylphenyl substituted salicylaldiminato ligands. The copolymer with the highest molecular weight was obtained by using mono salieylaldiminato vanadium catalyst 1 f having ligands with tert-butyl at the ortho and para of the aryloxy moiety.Mono salicylaldiminato vanadium（Ⅲ） complexes （1a-1f） [RN = CH（ArO）]VC12（THF）2 （Ar = C6H4 （1a-1e）, R = Ph, 1a; R = p-CFaPh, 1b; R = 2,6-Me2Ph, 1c; R = 2,6-iPrEPh, 1d; R = eyclohexyl, 1e; Ar = C6HEtBU2（2,4）, R = 2,6-iPrEPh, 1f） and bis（salicylaldiminato） vanadium（III） complexes （2a-2f） [RN ： CH（ArO）]EVCI（THF）x （Ar = C6H4 （2a-2e）, x = 1 （2a-2e）, R = Ph, 2a; R = p-CF3Ph, 2b; R = 2,6-Me2Ph, 2c; R = 2,6-iPr2Ph, 2d; R = cyclohexyl, 2e; Ar = C6HEtBU2（2,4）, R = 2,6-iPrEPh, x = 0, 2f） have been evaluated as the active catalysts for ethylene/1-hexene copolymerization in the presence of Et2A1C1. The ligand substitution pattern and the catalyst structure model significantly influenced the polymerization behaviors such as the catalytic activity, the molecular weight and molecular weight distribution of the copolymers etc. The highest catalytic activity of 8.82 kg PE/（mmolv.h） was observed for vanadium catalyst 2d with two 2,6-diisopropylphenyl substituted salicylaldiminato ligands. The copolymer with the highest molecular weight was obtained by using mono salieylaldiminato vanadium catalyst 1 f having ligands with tert-butyl at the ortho and para of the aryloxy moiety.

关 键 词：Ziegler-Natta polymerization COPOLYMERIZATION Vanadium catalyst Polyolefin. 

分 类 号：O631.3[理学—高分子化学]