Synthesis Of Acrylate Reactive Microgels And Its Application

With increasing consciousness for environmental protection and the reinforcement of environmental legislation, coating technology is in a fast development era. New coating technology requires new raw materials. Reactive microgels are one of the most useful new polymers. Due to their intramolecularly crosslinked structure, reactive microgels possess superior properties and functions, which offers a new approach to improve coating performance. Therefore, research on the synthesis and application of reactive microgels is of great practical and theoretical significance.Referring to other people's research, the acrylate reactive microgels have been prepared using emulsion polymerization, core-shell emulsion polymerization, and self-stabilized dispersion polymerization. In addition, the properties and applications of the prepared reactive microgels have been studied.The reactive microgel was synthesized by the emulsion polymerization technique. Factors affecting kinetics of emulsion polymerization were discussed, and the nucleation mechanism of reactive microgel formation in crosslinking emulsion polymerization was investigated. Results show that emulsifier concentration, initiator concentration, and crosslinker concentration have great influence on the kinetics of emulsion polymerization. Compared to the previous results from linear emulsion polymerization, the crosslinking density is fairly high even from very early stage in crosslinking emulsion polymerization. So Nucleation of microgel formation can take place in both micelles, and monomer droplets and the polymerization rate is inversely proportional to the emulsifier concentration because of the gel effect. The study on the particle size in the synthesis process indicate that the particle size of microgels particles increases linearly with monomer conversion and the particle size distribution is still rather narrow with the progress of polymerization.Based on particle design theory and functional group localization technique, the latex with core-shell structure was prepared using the microgels as core and polymer with good film formability as shell. Besides, the reactive groups, i.e. epoxy and carboxyl groups are enriched in the core and shell region, respectively. The structure of the latex was finally characterized using Fourier Transform Infrared Ray spectrum (FTIR) and Transmission Electron Microscope (TEM). The results illustrate that,...