Cristallizing And Photografting Of LiAA On Material Surfaces

In the thesis, the crystallization capacity of functional monomer lithium acrylate (LiAA) on the pretreated surfaces of glass and Polyethylene glycol terephthalate (PET) films was studied, with methanol or water as solvent. ATR-FITR spectra analysis confirms the existence of the lithium bond. Inverted phase contrast microscope and SEM observations show the crystal morphology of the LiAA is hexagonal after the volatilization of methanol. The same phenomenon can also be observed in diluent water solution, while in concentrated solution, the crystal of LiAA appears to be ravine. The crystal morphology is influenced by the concentration of LiAA, the solvent's property and the substrate's property. Pressure and temperature in crystallizing have no significant influence on crystal morphology but the size of crystal.Later, the crystal pattern of LiAA was fixed by photopolymerization in crystal phase. FTIR spectra analysis proves the production of polymer. Microscope observation shows the special structure of the polymer, indicating that the patterning of macromolecular could be obtained by crystal phase polymerization. The curve of conversion of monomer versus time shows the growth of conversion with the elongation of reaction time and a low...