Study On The Polymerization Of Ferrocene-Containing Polar Alpha-olefin Catalyzed By Half-sandwich Scandium Complexes

In the previous study^[119],the glass transition temperature of the polymer obtained by catalyzing a polarα-olefin with a rare earth metal catalyst was too low to be applied,so it is envisaged to add ferrocene to the polymerization system to increase the glass transition temperature of the polymer and it also imparts electrochemical properties to the polymer.In this thesis,five novel ferrocene-containing polar alpha-olefin 1-（2-ferrocenylvinyl）-4-（3-butoxy）benzene（monomer A）,1-Ferrocenylbenzyl-4-（3-butenyloxy）benzene（monomer B）,1-ferrocenylbenzyl-4-（3-butenylthio）benzene（monomer C）,1-Ferrocenyl-4-（3-butenyloxy）benzene（monomer D）,1-ferrocenyl-4-（4-pentenyloxy）benzene（monomer E）were synthesized,and polymer A,polymer B,polymer C,polymer D were obtained using rare earth catalyst C₅H₅Sc（CH₂C₆H₄NMe₂-o）₂（Sc-Cp）,toluene as solvent in room temperature under nitrogen atmosphere.The product was characterized by ¹H NMR,¹³C NMR and GPC.From the ¹³C NMR,the obtained polymers were all syndiotactic,and their syndiotacticity were 91%,92%,97%,99%,respectively.The properties were tested by DSC,XRD and CV.The glass transition temperatures measured by DSC,were 112.1℃,52.3℃,40.2℃and 87.3℃respectively.They have thermal property advantages over most ferrocene-free polar alpha-olefin polymers which are difficult to apply due to a glass transition temperature lower than room temperature.XRD showed that the polymers were all amorphous polymers,and CV showed that the polymers all had a quasi-reversible redox process;the morphology of the polymers was observed by SEM,and spherical particles were observed in the polymers A,B,C and D.In addition,we are charged with different molar ratios of 1-ferrocenylbenzyl-4-（3-butenoxy）benzene and 3-butenyloxybenzene（25/50,25/25,50/25）,using Sc-Cp catalyst obtained copolymer that having different compositional content ratio of 0.5/1,0.8/1,and 1.7/1,and the control of the amount of ferrocene-containing branches on the polymer chain was achieved.This chapter also tried to copolymerize styrene with 3-butenyloxybenzene,but the experimental results show that the two monomers cannot obtain copolymerization products.All the products were characterized and tested by¹H NMR,¹³C NMR,GPC,DSC,CV and SEM.