抄録
It is the object of this work to provide a picture of convenient apparatus which enables evaluation of fatigue of plastics in the presence of chemicals.
The apparatus is substantially of ASTM D 671-63T (A) Type, and is equipped with devise for trickling liquid chemicals upon the specimen, with an electronic system for continuously recording the dynamic load, and with three pulleys for reducing the speed.
The trickling of chemicals is processed by conveying the liquid from the storage tank to a burette and adjusting the stopcock so as to make the liquid drop on the middle portion of the specimen at a controlled rate. The portion is wound with suitable cloth to insure uniform contact of the liquid with the specimen.
In the experiments with polyacetal and polyamide in various concentration of hydrochloric acid, the apparatus proved efficient in evaluating fatigue of plastics under the influence of the liquid chemicals.
