硫化橡胶或热塑性橡胶.非等温条件下拉伸应力的测定

[中文适用范围]： 本文件描述了两种在非等温条件下测量拉伸应力的方法。 — 方法 A：在各种预应变和温度条件下测量热应力作为时间的函数。 — 方法 B：在给定应变和给定加热速率下的温度变化下测量试件中的应力变化，作为温度的函数。 这样，可以加速橡胶热机械行为的确定，例如为了老化的比较测试或估计操作温度的上限。 测量装置配备有合适的加热室，用于记录应力随时间或温度的变化，直到样品破裂或应力接近零或持续一定时间。 [外文原描述]： This document describes two methods for measuring stress in tension under non-isothermal conditions. — Method A: The thermal stress is measured for various pre-strain and temperature conditions as a function of time. — Method B: The change of stress is measured in a test piece at a given strain and under variation of temperature at a given heating rate as a function of temperature. In this way, the determination of the thermal-mechanical behaviour of a rubber can be accelerated, e.g. for the purpose of comparative testing of aging or estimating the upper limit of the operating temperature. The measurement device, which is equipped with a suitable heating chamber, is used to record the stress as a function of time or temperature until the sample breaks or the stress has approached zero or for a certain time.