Styrene/maleic anhydride alternating copolymer (SMA) synthesized by radical copolymerization of styrene with maleic anhydride was subjected to a reaction with zirconium chelate (EZE) for the formation of zirconium-containing organic-inorganic hybrid. Coating films of the hybrid were obtained by dip coating its solution on polymer, metal, ceramic, and glass substrates. The pencil hardness of the coating films increased with increasing molecular weight of SMA, and showed a highest value when the amount ratio of EZE to maleic anhydride group in SMA was unity. Zirconia thin films were prepared by pyrolysis of the coating films at 1000°C.
Gold nanoparticles were prepared in poly (amidoamine) dendrimers-poly (N-isopropylacrylamide) gel matrix. Three dendrimers used were generation 5 with surface amino group, generation 5.5 with surface methyl ester group, and generation 5.5 with surface carboxyl group. In the cases of dendrimers with surface amino group and surface methyl ester group, gold nanoparticles having diameter of 3-4 nm were obtained and their size distribution was relatively narrow. However, in the case of dendrimer with surface carboxyl group, gold nanoparticles with much larger size and wider size distribution were obtained. The role of dendrimers in the gel matrix for formation of gold nanoparticles was discussed.
Recently, we have reported the several types of functinally graded polymer materials by dissolution-diffusion method. In this report, we discussed preparation and properties of (BMA-b-EO) copolymer/LiClO4 complex and functionally graded composite of its complex and PBMA. It was found that this functionally graded composite was found to have excellently wide compositional gradient. Then, it was found that the tensile properties of the graded composite changed gradually and continuously for its depth direction, while the electric conductivity of the composite changed uncontinuously at 30-40% (distance from one side/the sample thickness) like a two-layered materials.