标准摘要
[中文适用范围]： 本文件规定了两种方法，用于确定硫化或热塑性橡胶试件所施加的反作用力的减少量，该试件已被压缩至恒定变形，然后经历温度循环。 方法A：温度在高温老化和低温之间循环，以检查该低温下的密封力。 方法B：温度在高温和低温之间连续循环，以在试件中引入热应力。 反作用力通过连续测量系统来确定。 本文件规定了两种形式的试件：圆柱形试件和环形试件。 只有在相似尺寸和形状的试件上进行结果比较才有效。 使用环形试件特别适合测定液体环境中的应力松弛。 [外文原描述]： This document specifies two methods for determining the decrease in counterforce exerted by a test piece of vulcanized or thermoplastic rubber which has been compressed to a constant deformation and then undergoes temperature cycling. Method A: The temperature is cycled at intervals between a high temperature for ageing and a low temperature for checking the sealing force at this low temperature. Method B: The temperature is cycled continuously between a high temperature and a low temperature to introduce thermal stress in the test piece. The counterforce is determined by means of a continuous-measurement system. Two forms of test pieces are specified in this document: cylindrical test pieces and rings. Comparison of results is valid only when made on test pieces of similar size and shape. The use of ring test pieces is particularly suitable for the determination of stress relaxation in liquid environments.
英文名称Rubber, vulcanized or thermoplastic — Determination of stress relaxation in compression — Part 2: Testing with temperature cycling