ガラス繊維充てんポリカーボネートの圧縮クリープ特性

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Compressive creep tests were carried out using some injection molded cylindrical specimens of polycarbonate filled with 30 wt % glass-fiber and unfilled. Creep properties under various conditions of temperature and compressive stress were discussed. The results obtained are as follows: (1) At the condition of temperature under about 60℃, the maximum stress below which creep compliance does not depend on stress is 3〜6 kg/mm^2 on filled polycarbonate and 1 kg/mm^2 on unfilled. (2) Creep compliance D(t) is shown in the following equation, when the conditions are not very severe. log D(t)=a log t+b (1) where t is time. Creep compliance D(t) after a long time is able to be estimated by using the values of a and b obtained from short period creep tests under conditions being considered. (3) The value of a in equation (1) increases with temperature, and b is constant. The reinforcement with glass-fiber brings so low values of a and b as to be effective for an increase of dimensional stability under load.
社団法人日本材料学会の論文
1976-08-15