Study On The Synthesis And Applications Of Polyalkyl Substituent Group Ortho-quinone Diimine Complexes

Polyethylene has became the common synthetic resin and its productivity is the first of all.With the development of scientific knowledge,the requirement for special polyethylene materials is going to increase.The key for the production of special polyethylene product is the catalyst with better activity and better performance.In 1995,Brookhard first known their new matter can carry out polymerization of ethylene and a-olefine,the complexes made by benzene ring and late transition metal to preparation by screening the other late transition metal complexes.It was found that the influence of substituents on the performance of catalysts,including catalytic acitivities,molecular weight of the polymer and structure of polymer in later studying.Study on synthesis and applications of novel diimine complexes in polyethylene with not commen structures became an important research direction in polymerization catalyst.ortho-quinone diimine complexes with many substituents have got and their applications in the polymerization of ethylene have been studied so it is found that the best reaction conditions and properties be related to polymerization product.We can get the coordination complex required from 3,5-di-tert-butyl-orrho-catechol,4 kinds of amides and 2 kinds of metal salts.in the reaction of polymerization of ethylene it is discovered that cocatalyst have an important role in polymerization results,so other conditions are fixed to explore the results when TEA,MAO and EASC is used as cocatalyst.MAO is used for cocatalyst,Al/Fe is 1000,pressure is 3Mpa,a iron coordination complex can carry out oligomerzition of ethylene.