The Relaxation of Stress in Undrawn Amilan

概要

論文の詳細を見る
Stress relaxation data for undrawn Amilan monofilaments (Thin fineness is about 800 deniers and viscosity-average molecular weight is 10,600,) are obtained as functions of draw ratio and heat-treatment temperature. The relaxation curves obtained are all fitted satisfactorily by an empirical equation derived in our previous study for a commercial drawn Amilan yarn. Increasing cold-drawing is shown to decrease over-all rates of stress relaxation in such a manner that a rather rapid fall of these rates appears in the neighborhood of draw ratio 8.0. Both the elastic modulus and the elongation at break also exhibit a characteristic change in this region of draw ratio. Comparison with the data for the drawn sample of the previous study indicates an interesting similarity in stress relaxation behavior of the drawn sample at enough high temperature and of the unstretched sample at room temperature. It is shown that the length of cooling period after heattreatment has a pronounced effect upon the initial stress (or modulus) as well as the subsequent stress relaxation curve. This is found to be attributable to the absorption of vapor occurring during the course of cooling. Measurements of stress relaxation are made for samples which were allowed to reach sorption equilibrium after heat-treating at various temperatures, and the results are discussed as providing the true heat-treatment effect on the behavior in question.
社団法人日本物理学会の論文
1954-10-25

The Relaxation of Stress in Undrawn Amilan

スポンサーリンク

概要

著者

関連論文

スポンサーリンク