平行板プラストメーターによる可塑性脂肪の粘弾性 : 分散型のレオロジー

概要

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By the use of a parallel plate plastometer, the viscosity, elasticity, yield value and retardation time of plastic fat containing tristearin in paraffin oil were measured in a temperature range from 21℃ to 39℃. The analysis of experimental data was made on the basis of both equations developed by Dienes and others and Oka and his group. The equation of Oka was successfully used for obtaining the yield value of a Bingham body. Although the plastic fat has a considerably high yield value, the difference of the creep curves obtained by both equations was found to be almost negligible. Both the logarithmic viscosity and the logarithmic yield value of plastic fat obtained from the creep curve at 28℃ increase linealy with the increase of the concentration of tristearin in paraffin oil, ranging from 26% to 38%. But the relation between the retarded elasticity and the concentration of tristearin made a curve upward in the case of the lower content of tristearin. The creep curves of plastic fat containing 34.1% of tristearin for a narrow range of temperature from 29℃ to 39℃ can be shifted parallel to the time axis and be superimposed on a master curve.
社団法人日本材料学会の論文
1961-05-15