含三乙基硅基FI催化剂的合成及其在制备超高分子量聚乙烯中的应用  

Synthesis of triethylsilyl-based FI catalyst and its use in preparation of ultra-high molecular weight polyethylene

作　　者：郭建双 杨超 王新威 GUO Jian-shuang;YANG Chao;WANG Xin-wei(Shanghai Research Institute of Chemical Industry Co.,Ltd.,State Key Laboratory of Polyolefins and Catalysis,Shanghai Key Laboratory of Catalysis Technology for Polyolefins,Shanghai 200062,China)

机构地区：[1]上海化工研究院有限公司,聚烯烃催化技术与高性能材料国家重点实验室,上海市聚烯烃催化技术重点实验室,上海200062

出　　处：《应用化工》2020年第5期1199-1202,1207,共5页Applied Chemical Industry

基　　金：上海市国资委企业技术创新和能力提升项目(2018002);上海市国际科技合作基金项目(16160731301)。

摘　　要：以卤代苯酚为原料,在咪唑和4-二甲氨基吡啶存在下,与三乙基氯硅烷反应,得到酚氧邻位为三乙基硅基取代的取代苯酚,随后与多聚甲醛反应,得到取代水杨醛,与伯胺通过醛胺缩合,得到苯氧亚胺配体,最后与金属络合,得到两种含三乙基硅基的苯氧亚胺锆催化剂,用于催化乙烯聚合制备超高分子量聚乙烯。在聚合温度为70℃,乙烯压力1.0 MPa,n(Al)/n(Zr)=7000条件下,以甲苯为溶剂,催化剂j的催化活性可达8.45 kg PE/(mmol·Zr·h),所得聚乙烯的黏均分子量介于100×104~800×104 g/mol,其熔点139℃,结晶度49.7%。Halogenated phenol is used as a raw material,in the presence of imidazole and4-dimethylaminopyridine,reacted with triethylchlorosilane to obtain a substituted phenol.The substituted phenol is reacted with paraformaldehyde to obtain a substituted salicylaldehyde,and then the aldehyde amine condensation reaction is carried out to obtain a phenoxyimine ligand.Finally,after complexation with the metal,two triethylsilyl-containing phenoxyimine zirconium complexes are obtained for catalyzing the polymerization of ethylene to prepare ultrahigh molecular weight polyethylene.With toluene as solvent,the catalytic activity of complex j can reach 8.45 kg PE/(mmol·Zr·h)at 70℃,1.0 MPa,n(Al)/n(Zr)=7000.The viscosity average molecular weight of the obtained polyethylene is between 100×104~800×104 g/mol.The melting point of polyethylene was as high as 139℃and the crystallinity was as high as49.7%.

关 键 词：三乙基硅基 FI催化剂 超高分子量聚乙烯 

分 类 号：TQ31[化学工程—高聚物工业] TQ32