摘要
以3-枯基-5-甲氧基水杨醛和2,6-二甲基环己胺为原料,经缩合反应合成了水杨醛亚胺配体（Ⅰ）,利用四氯化锆-四氢呋喃络合物和配体反应制备了相应的芳氧基亚胺二氯化锆络合物（Ⅱ）,用MS、~1HNMR和^（13）CNMR表征了配体及络合物的结构,并评价了络合物Ⅱ催化乙烯聚合的性能。在甲基铝氧烷（MAO）助催化下,Ⅱ成功地催化了乙烯聚合反应。在50℃、0.9MPa乙烯压力下,Ⅱ在甲苯中的催化活性为53.5kg聚乙烯（PE）/（mmol×Zr×h）,所得聚合物为超高相对分子质量（简称分子量）聚乙烯,黏均分子量达3.3×10~6 g/mol。当以正己烷为溶剂时,聚乙烯黏均分子量提高至4.1×10~6 g/mol。
Salicylaldehyde imine ligand（Ⅰ） was prepared via a condensation reaction between 3-cumyl-5-methoxy salicylaldehyde and 2,6-dimethylcyclohexan-1-amine. The ligand Ⅰ was then reacted with zirconium chloride tetrahydrofuran complex to form bis（phenoxy-imine） zirconium dichloride complex（Ⅱ）. These compounds were characterized by mass spectroscopy（MS）, ~1 HNMR and ^（13） CNMR. The catalytic property of complex Ⅱ was evaluated for ethylene polymerization. The results showed that complex Ⅱ was capable to catalyze ethylene to produce polyethylene（PE） using methylaluminoxane（MAO） as co-catalyst. Under the conditions of 50 ℃ and 0.9 MPa ethylene, complex Ⅱ displayed a catalytic activity of 53.5 kg PE/（mmol×Zr×h） in toluene, resulting in ultra-high molecular weight polyethylene with a viscosity average molecular weight value of 3.3 × 10~6 g/mol. While n-hexane was used as solvent, the molecular weight of polyethylene could reach 4.1 × 10~6 g/mol.
作者
王原
郑浩
叶晓峰
罗勇
WANG Yuan;ZHENG Hao;YE Xiao-feng;LUO Yong(Shanghai Research Institute of Chemical Industry Co.,Ltd.,State Key Laboratory of Polyolefins and Catalysis,Shanghai 200062,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2018年第10期1678-1682,共5页
Fine Chemicals
基金
上海市浦江人才计划(17PJ1432700)~~
关键词
芳氧基亚胺
锆络合物
乙烯聚合
超高分子量聚乙烯
催化技术
phenoxy-imine
zirconium complex
ethylene polymerization
ultra-high molecular weight polyethylene
catalysis technology
