亚胺基吡啶铁配合物/茂金属催化乙烯原位共聚中的共单体效应  

COMONOMER EFFECT OF THE IN-SITU COPOLYMERIZATION OF ETHYLENE CATALYZED BY Et(Ind)_2ZrCl_2/ 2,6-BIS(IMINO)PYRIDYL IRON(Ⅱ) COMPLEXES

作　　者：黄英娟[1] 姬荣琴[1] 刘盘阁[1] 李贺新[1] 闫卫东[1] 

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

出　　处：《高分子材料科学与工程》2005年第3期73-76,共4页Polymer Materials Science & Engineering

基　　金：工程塑料国家重点实验室开放基金(SKLEP0062);天津市自然科学基金重点项目(023802211);河北省自然科学基金(202008)联合资助

摘　　要：研究了亚胺基吡啶铁配合物{[(2-Me-4-R-C6H4N=C(Me))2C5H3N]FeCl2}(1R=Br,2R=OMe)分别与茂金属Et[Ind]2ZrCl2复配催化乙烯原位共聚中的共单体效应。探讨了齐聚催化剂的活性和聚合反应温度对共单体效应的影响,以及共单体效应对所得产物物理性能的影响。结果表明,随着齐聚催化剂活性的降低,出现共单体效应时两种主催化剂的最佳配比值增加;聚合温度的升高使最高活性值下降。共单体效应对所得共聚物的物理性能影响不明显。Linear low density polyethylene from ethylene as only monomer was prepared by the combination catalyst system of Et(Ind)_2ZrCl_2 and {[(2-Me-4-R-C_6H_4N=C(Me))_2C_5H_3N]FeCl_2 (1 R=Br, 2 R=OMe )}activated with methylaluminoxane(MAO). The polymerization activities are varied in dependence on the molar ratio of Fe to Zr for two systems. It is observed that the comonomer effect appeares in the in-situ copolymerization of ethylene. The comonomer effect is some strongly influenced by catalysts for oligomerization and the polymerization temperature. The densities, the melting temperatures and crystallinities of the polymer decrease compared to polyethylene from homopolymerization of ethylene under the same conditions. But, they diminishes slowly with the increment of the molar ratio of Fe to Zr in the feed.

关 键 词：共单体效应 原位共聚 乙烯 亚胺基吡啶铁配合物 茂金属 

分 类 号：TQ316.61[化学工程—高聚物工业]