铁系亚胺基吡啶复配催化乙烯原位共聚产物的表征  

CHARACTERIZATION OF BRANCHED POLYETHYLENE PREPARED BY in situ COPOLYMERIZATION OF ETHYLENE WITH IRON (Ⅱ)(IMINO) PYRIDINES COMPLEXES

作　　者：李贺新[1] 石金永[1] 闫卫东[1] 胡友良[2] 

机构地区：[1]河北工业大学化工学院高分子科学与工程研究所,天津300130 [2]中国科学院化学研究所分子科学中心工程塑料国家重点实验室,北京100080

出　　处：《高分子学报》2004年第6期913-916,共4页Acta Polymerica Sinica

基　　金：国家自然科学基金 (基金号 5 0 2 73 0 0 9);工程塑料国家重点实验室开放基金 (基金号SKLEP0 0 62 );天津市自然科学基金重点项目 (基金号 0 2 3 80 2 2 11);河北省自然科学基金 (基金号 2 0 2 0 0 8);河北省博士基金资助项目

摘　　要：Branched polyethylene from ethylene as single monomer was prepared by the tandem catalyst system of {2-[2-Me C6H4 N（Me）]2C5H3N}FeCl2（1） and {2,6-[1-(2,6-Me2-4-Br-C6H4N（Me）]2C5H3N} FeCl2（2） activated with methylaluminoxane （MAO） .The products of polymerization were characterized by DSC,GPC and （）13C-NMR.The results revealed that the copolymer produced by in situ copolymerization of ethylene was a mixture of branched polyethylene and α-olefin.The content of α-olefin in the mixture was increased with increasing the molar ratio of catalysts 1/2.The MWD paramelers of polyethylene and copolymer were 28\^6 and 7\^9, respectively.（）13C-NMR spectra showed that there were ethyl groups,butyl groups and long chain alkyl groups in the copolymer.The average degree of branching of such branched polyethylene was less than 5C/1000C.Branched polyethylene from ethylene as single monomer was prepared by the tandem catalyst system of {2-[2-Me C_6H_4 N(Me)]_2C_5H_3N}FeCl_2(1) and {2,6-[1-(2,6-Me_2-4-Br-C_6H_4N(Me)]_2C_5H_3N} FeCl_2(2) activated with methylaluminoxane (MAO) .The products of polymerization were characterized by DSC,GPC and ()^(13)C-NMR.The results revealed that the copolymer produced by in situ copolymerization of ethylene was a mixture of branched polyethylene and α-olefin.The content of α-olefin in the mixture was increased with increasing the molar ratio of catalysts 1/2.The MWD paramelers of polyethylene and copolymer were 28\^6 and 7\^9, respectively.()^(13)C-NMR spectra showed that there were ethyl groups,butyl groups and long chain alkyl groups in the copolymer.The average degree of branching of such branched polyethylene was less than 5C/1000C.

关 键 词：原位共聚 催化 ^13C-NMR 吡啶 复配 亚胺 乙烯 CL2 表征 DSC 

分 类 号：O631[理学—高分子化学]