|Budget Amount *help
¥1,800,000 (Direct Cost : ¥1,800,000)
Fiscal Year 1992 : ¥500,000 (Direct Cost : ¥500,000)
Fiscal Year 1991 : ¥1,300,000 (Direct Cost : ¥1,300,000)
Novel method to construct polymer alloys composed of polymer microgels was investigated.
First, a special emulsion polymerization to prepare monoingredient poly(4-vinylpyridine) (P4VP) microgels with a narrow size distribution was established. In this method, aa reactive, partially quarternized P4VP linear polymer was used as an emulsifier. The effects of monomer concentration and emulsifier/monomer ratio on particle size were investigated. Microgels with 70-700 nm, were obtained. Then, the studies on preparation and fixation of microgel films with ordered structure formed by P4VP microgels (film of single component), were carried out. It was found that the arrangement of particles in the films almost showed face-centered cubic. Three kinds of method were devised to fix such ordered structure. In the third part of this study, a ordered structure composed of P4VP (diameter d=260 nm) microgel and poly(styrene) microgel(d=190 nm) was found and the identification of the structure was carried out.As a conclusion, the structure was similar to MgCu_2 crystal type. And the fraction of the ordered phase was found to be dependent on the mixing ratio of two components. To study the arrangement of the microgels, a special new method,by which interparticle contact angle composed of three particles are able to be calculated, was devised. In the last part of this study, the application of microgels to modify the character of chromatogel was investigated.