Supported rare earth catalysts were made from Nd(OiPr)3 and the chlorides of the elements of ⅡA groups which were used as supporters of the catalyst.In the study on the relationship between the composition of s...Supported rare earth catalysts were made from Nd(OiPr)3 and the chlorides of the elements of ⅡA groups which were used as supporters of the catalyst.In the study on the relationship between the composition of supporters and the polymerization activity of butadiene in the presence of the supported rare earth catalysts,it was found that the electronegativity of ⅡA groups elements had an obvious effect on the activity of supported catalysts that the activity and stereospecificity of the supported catalyst increased with the increasing of the electronegativity.This phenomenon was explained in terms of the interaction between the HOMO of the butadiene and the LUMO of the neodymium.展开更多
文摘Supported rare earth catalysts were made from Nd(OiPr)3 and the chlorides of the elements of ⅡA groups which were used as supporters of the catalyst.In the study on the relationship between the composition of supporters and the polymerization activity of butadiene in the presence of the supported rare earth catalysts,it was found that the electronegativity of ⅡA groups elements had an obvious effect on the activity of supported catalysts that the activity and stereospecificity of the supported catalyst increased with the increasing of the electronegativity.This phenomenon was explained in terms of the interaction between the HOMO of the butadiene and the LUMO of the neodymium.
