1949 年 69 巻 3 号 p. 133-137
Supersonic waves, when played on compounds of higher molecules, give rise to colloidal and chemical changes in their solutions. Supersonic waves were applied, while measuring intensities, on the solutions of viscose and methylcellulose and Schweizer reagent solution of cotton cellulose and the decrease in their viscosity was measured by Ostwald's viscosimeter. All three solutions showed greater decrease in viscosity by the increase in the intensity of supersonic waves but viscose solution showed greatest decrease in a concentration around 1.5%. No change in the decrease rate of viscosity was seen in the methylcellulose solution due to intensity in concentrations under 0.5%. The average rate of polymerization reached 30 when supersonic waves of 0.5g weight intensity (radiation pressure bearing on a disc 1.5cm in diameter equal to ca. 277erg/cm3 when converted to energy density in the solution) was radiated for 30 minutes.
Cotton cellulose dissolved in Schweizer reagent showed remarkable decrease in viscosity by 3-minutes radiation of 0.5g weight density but the decrease become gradual after that, the solution decomposing completely with radiation over 30 minntes, precipitating cellulose.