Study On Synthesis, Characterization And Photochromic End Modification Of Hyperbranched Polymers

The hyperbranched polymers have been attracted considerable attention due to its highly branched units with peculiar properties, such as low melt viscosity, good dissolubility, non-entanglement and a large number of active end groups. Hyperbranched polymers were widely used in many fields, such as functional materials, clinical medicine, supramolecular chemistry, biochemistry and pharmaceutical industry. In the paper, akind of hyperbranched poly(amine-ester)s were synthesized and characterized . In addition, a kind of photochromic hyperbranched polymer were synthesized by the modification of hyperbranched poly(amide-ester)s and characterized by UV techniques.There are three chapters in this paper, and the main contents are as following:In chapter 1, the overviews of the progress in hyperbranched polymers were given.In chapter 2, synthesis and characterization of the AB3 type hyperbranched poly(amine-ester)s. The AB3 type hyperbranched poly(amine-ester)s were synthesized by the reaction of chloroacetidin with tri(hydroxymethyl) aminomethane on the correct condition. This polymer were characterized by MS, TG and viscosity measurement. In chapter 3, Study on the end photochromic modification of hyperbranched poly(amide-ester)s. A kind of photochromic hyperbranched polymer were synthesized by the end group modification of hyperbranched poly(amide-ester)s. The polymer were characterized by UV spectrum.