Study On Solvothermal Atom Transfer Radical Polymerization And Ring-opening Reaction Of GMA

The homogeneous polymerization of glycidyl methacrylate(GMA) was successfully performed by atom transfer radical polymerization(ATRP) and reverse atom transfer radical polymerization(RATRP) by using solvent thermal system. The results of gel permeation chromatography(GPC) using THF as eluent displayed that the polymerization of the study has the characteristics of living radical polymerization indicated by the product molecular weight increasing with the increase of monomer conversion, relatively narrow polydispersity index(PDI<1.5),and the linearity of the plot of1n[M]o/[M] vs reaction time indicating the concentration of propagating species remained constant throughout the polymerization in ATRP of GMA. we also carried out a detailed study on the effect of [ligand]/[metal] ratio、solvent polarity、reaction temperature and types of initiator. Well-defined poly glycidyl methacrylate(PGMA) with low polydispersities have been obtained by using CuBr/bpy(the ratio of [ligand]/[metal] is2:1) as catalyst system in THF at70℃. Additionally, induction periods were observed in RATRP of GMA. The subsequent ATRP of methyl methacrylate (MMA) using PGMA-Br as the macroinitiator and the catalyst system of CuBr/bpy yielded block copolymer of PGMA-b-PMMA. The results of using a combination of analytical techniques like FT-IR and1H-NMR all indicated successful synthesis of PGMA-b-PMMA and the epoxy resin remaining during the course of reaction. The results also indicated that PGMA-Br macroinitiator had certain initiating activity.In this work, we studied the ring-opening reaction of poly glycidyl methacrylate (PGMA) with diethylene triamine and diethanolamine yielding β-amino alcohols which are the key intermediates to many organic compounds. Then we prepared CdS/organic-inorganic composites by employing the corresponding PGMA as polymer template. We also investigated high photocatalysis characteristics of CdS/PGMA-DEA to photoreduetion of methyl orange under the UV illumination. The thermal property of composites was characterized by thermogravimetric analysis, and field emission scanning electron microscopy were employed to elucidate the characteristics of surface morphology and particle size, and the possible scheme of the reaction.