The self assembly between diazoresin(DR) and the homopolymer or copolymers of 4 N hydroxyphenyl acrylamide(NHPA) has been investigated.It was confirmed that the driven force of the assembly is H bonding attraction, in which the DR plays a role of H acceptor, while the NHPA polymers act as a H donor, Under UV, the multiayer films become very stable towards polar solvents. For example, no any change was observed when the irradiated film was immersed in DMF at 20 ℃ for 12 h, but the unirradiated film was destroyled completely when it was immersed in DMF at the same temperature for 20 min. The dramatically improvement for the stability of the film towards polar solvents should be attributed to the bond conversion of the layers from H bond to covalent bond under UV irradiation.
Carboxy containing colloidal particles were prepared from emulsion copolymerization of styrene-acrylic acid-butyl acrylate.The particle size and the size distribution were determined on mica by atomic force microscopy after evaporating the water of the diluted emulsion.A sandwich structure covalently attached between the layers and particles has been fabricated from nitro-substituted diazoresin (NDR) and carboxy containing colloidal particles by the self-assembly combining UV irradiation technique.The ionic bonds between the layers and particles convert to covalent bonds under UV irradiation and the stable sandwich structure was achieved successfully.The assembly process,the stability of the film toward DMF etching and the morphology of the films were also reported.
