摘要
经过丁二酮的羰基与邻氨基酚的氨基加成缩合反应制得新型双亚胺类配体,与四氯化钛配位合成了丁二酮缩邻氨基酚钛配合物,以其为主催化剂、以甲基铝氧烷为助催化剂,探讨了该催化剂体系在甲苯溶剂中对乙烯均聚的催化性能。在反应温度为40℃、反应压力为0.8MPa、反应时间为45min、助催化剂与主催化剂摩尔比为4 500的最佳条件下,催化剂的活性为1.53×106g/(mol·h),所得聚合物的黏均相对分子质量高于4.5×105,并且具有较高的熔点(大于130℃),说明该聚合物为高结晶线性聚乙烯。
A new type double imine ligand was synthesized by the addition condensation reaction of butanedione carbonyl group and O-aminophenol amino.The butanedione o-aminophenol titanium complexe(titanium complex)was prepared by treatment of TiCl4 with the ligand.Activated by the methylaluminoxane(MAO),the performance of the complex for ethylene homopolymerization in toluene solvent was evaluated.The catalytic activity of the titanium complex reaches 1.53×106 g PE/(mol·h)at the reaction conditions:40℃,0.8MPa,reaction time of 45 min and the mole ratio of[MAO]/[Ti-complex]of4 500,The high linearity and crystallinity PE product has a relative molecular weight higher than 4.5×105 and a high melting point(130℃).
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2014年第11期38-43,共6页
Petroleum Processing and Petrochemicals
基金
国家自然科学基金资助项目(20803054)
煤转化与新型炭材料湖北省重点实验室2013年开放基金项目(WKDM201302)
湖北省自然科学基金项目(2014CFB 812)
关键词
丁二酮
钛配合物
乙烯均聚合
配位催化剂
线性聚乙烯
butanedione
titanium complex
ethylene homopolymerization
complex catalyst
linear polyethylene