双β-二酮钛系烯烃聚合催化剂的合成、表征及其催化乙烯聚合  

Synthesis and Characterization of β-Diketone Titanium Catalyst for Ethylene Polymerization

作　　者：高美怡 张丹[1] 李君华 钱建华[1] GAO Mei-yi;ZHANG Dan;LI Jun-hua;QIAN Jian-hua(Liaoning Petrochemical University,Fushun Liaoning 113001,China)

机构地区：[1]辽宁石油化工大学,辽宁抚顺113001

出　　处：《当代化工》2024年第1期137-140,共4页Contemporary Chemical Industry

基　　金：辽宁省揭榜挂帅项目(项目编号:2021JH1/10400090);辽宁省教育厅项目(项目编号:L2020004)。

摘　　要：合成了一种新型β-二酮钛配合物[(acac)_(2)Ti(C_(6)H_(6))_(2)(3a)、(acac)_(2)Ti(C_(6)H_(5)OCH_(3))_(2)(3b)、(acac)_(2)Ti(C_(6)H_(5)CF_(3))_(2)(3c)],采用^(1)H NMR、^(13)C NMR、元素分析等方法进行表征。用配合物作催化剂,以甲基铝氧烷(MAO)为助催化剂催化乙烯聚合,研究了聚合条件(如Al/Ti摩尔比、聚合温度和催化剂结构)对催化活性的影响。其中3a对乙烯聚合活性达6.26×10^(5)g·mol^(-1)·h^(-1),聚合物最大的重均分子量M_(w)为13.47 kg·mol^(-1),分子量分布PDI为2.0。A novel β-diketone titanium complex[(acac)_(2)Ti(C_(6)H_(6))_2(3a),(acac)_(2)Ti(C_(6)H_(5)OCH_(3))_(2)(3b),(acac)_(2)Ti(C_(6)H_(5)CF_(3))_(2)(3c)]was synthesized and characterized by ^(1)H NMR,^(13)C NMR and elemental analysis.Ethylene was polymerized with the complex as catalyst and methylaluminoxane (MAO) as cocatalyst.The effects of polymerization conditions (such as Al/Ti molar ratio,polymerization temperature and catalyst structure) on the catalytic effect were studied.The polymerization activity of 3a to ethylene reached 6.26×10^(5) g·mol^(-1)·h^(-1),the maximum weight average molecular weight M_(w) of the polymer was 13.47 g·mol^(-1),and the molecular weight distribution PDI was 2.0.

关 键 词：β-二酮钛系 乙烯聚合 [O O]双齿配体 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]