Derivative of CC(cinnamoyl chloride) and PEI(polyethyleneimine) were selected to make photochemicals for patterning(lithography) of a flexible substrate. Crosslinking are formed by photoaddition between an excited cinnamoyl group of one PEI cinnamate ...
Derivative of CC(cinnamoyl chloride) and PEI(polyethyleneimine) were selected to make photochemicals for patterning(lithography) of a flexible substrate. Crosslinking are formed by photoaddition between an excited cinnamoyl group of one PEI cinnamate chain with that of a ground state cinnamoyl group belong to another. At UV 254㎚(max UV280㎚) absorbance PEI cinnamate was crosslinked, as a result of that, a phenomenon of the solubility decrease was appeared.