ISO 11358的本部分规定了使用热重分析技术分析聚合物的一般条件。它适用于液体或固体。固体材料可以是颗粒、颗粒或粉末。也可以使用该方法分析减小到适当试样尺寸的制造形状。 热重分析法可用于确定聚合物的分解温度和速率，同时测量其所含挥发物、添加剂和/或填料的量。 热重测量可以在动态模式（质量变化与编程条件下的温度或时间）或等温模式（质量变化与恒温下的时间）下进行。 也可以使用不同的测试气氛进行热重测量，例如，将惰性气氛中的分解与氧化降解分离。

This part of ISO 11358 specifies general conditions for the analysis of polymers using thermogravimetric techniques. It is applicable to liquids or solids. Solid materials may be in the form of pellets, granules or powders. Fabricated shapes reduced to appropriate specimen size may also be analysed by this method. Thermogravimetry can be used to determine the temperature(s) and rate(s) of decomposition of polymers, and to measure at the same time the amounts of volatile matter, additives and/or fillers they contain. The thermogravimetric measurements may be carried out in dynamic mode (mass change versus temperature or time under programmed conditions) or isothermal mode (mass change versus time at constant temperature). Thermogravimetric measurements may also be carried out using different testing atmospheres, e.g. to separate decomposition in an inert atmosphere from oxidative degradation.