Development of polymer hybrid materials and analyzing techniques for their depletions

Aiming at screening and producing new polymer materials resistant to radiation, development of an evaluation technique for depletion of polymer materials under complicated conditions including radiological and chemical environments was attempted. This study was carried out from the following three aspects; (1) evaluation of radiated polymers according to positron annihilation and gas probe analysis, (2) analysis of molecular characteristics of polymer substances by GPC and light scattering methods and evaluation of their depleting processes and (3) hybridization of organic polymers and silica glass and screening of radiation-resistant polymer materials. Cardo-polymers, PI-BP and PA-T were characterized by LS and SEC/MALLS and their molecular forms in solution were investigated based on the data as to molecular weight and size, and distribution of molecular weight. Thus, cardo-molecules were found to have very extended conformation in a solution. Study on the changes in the molecular weight distribution for radiated cardo-molecules is underway now. A strong gross film with highly solvent-resistant and water-resistant abilities could be produced through direct emulsion polymerization of tetraethoxysilane in the water-disperse system of polymer microsphere. This film is expected to use in an environment exposed to radiation. (M.N.)