Synthesis Of Polymers With Carboxylic Acid Group By ATRP And Preparation And Fluorescence Property Of Its Composite Materials With Metal Oxide, Metal Sulfide Nanoparticles

1. Polystyrene with two carboxylic acid end-groups (HOOC-PSt-COOH) was prepared by atom transfer radical polymerization (ATRP). TiO2 nanoparticles proceed using sol-gel method were introduced into the polymers to form HOOC-PSt-COOH/TiO2 nanocomposite, which was characterized by UV, TEM and TGA. The HOOC-PSt-COOH/TiO2 nanocomposite had good film formability and fluorescence properties. The fluorescence emission spectra of the composite in solvent and film were red-shifted compared with that of HOOC-PSt-COOH. The effects of reactants mole ratio, reaction time, solvents and ultrasonic on red-shift of fluorescence spectra were discussed.2. New monomer o-methyl-acrilamideyl-benzoic acid (o-MAABA) was synthesized and polymerized by ATRP to obtain P(o-MAABA) with carboxyl side chains. ZnO nanoparticles were introduced to P(o-MAABA) to prepare P(o-MAABA)-ZnO nanocomposite. IR, TEM and TA were used to characterize the nanocomposite system, which had good fluorescence properties and film formability. The fluorescence emission spectrum of the nanocomposite red-shifted compare with P(o-MAABA) and was influenced with the method of preparation, mole ratio of reactants, time and solvents.3. The P(o-MAABA)-ZnS nanocomposite was synthesized by in situ method. XPS and IR spectra acknowledged the coordination of P(o-MAABA) with Zn2+ and the surface chemical composition of P(o-MAABA)-ZnS nanocomposite; the average ZnS particle size was 3.8 nm indicated by XRD pattern and its distribution was...