研究期間：10108~10207;In this proposal, the core-shell structure submicrospheres which consisted of solvent-resistance core and better film-forming polymer shell were designed to improve the film properties of opal film. The periodic structure of opal film was constructed by core polymer and air, and the polymer of shell was served as binder between the interfaces of spheres. On the basis of soap-free emulsion polymerization experiences studied by the laboratory, monodisperse submicrospheres could be prepared in fast reaction by changing reaction temperature. In the first year, different kinds of monomers and compositions were studied to synthesize various degrees of cross-linked submicrospheres. The relationship between compositions of monomers and solvent-tolerance ability could be studied by solvent-tolerance test. And using the solvent-resistance submicrospheres as cores, a series of monodisperse core-shell submicrospheres, which consist of various shell Tgs, were synthesized by controlling the introducing time and monomer feeding ratio of second-step monomers (St, MMA, and BMA). The shell polymer chains could be spread without changing the formation of core, by dispersing this structure of submicrospheres into the organic solvent. And the purposed of improvement film properties could be carried out by self assembling the core-shell submicrospheres at suitable conditions. In second year, on the basis of the result of first year, the chosen core-shell spheres were used to construct the hydrophilic polymer shell. The hydrolysis process of ester groups was carried out by saponificate reaction and caused the hydrophilic polymer chains of shell portion. The advantages of improvement film properties were well discussed by spreading these chosen spheres into various intermedium (water, swelled by monomer (including initiator), and adsorbed melamine). This was advantages in the study of improvement film properties of opal film. If the basic study can be used as support, the applications of monodisperse particles would be extensively expanded.
