生橡胶挥发性物质含量测定. 第1部分: 热轧法和烘箱法

[中文适用范围]： 本文件规定了两种使用热磨机或烘箱测定生橡胶中挥发物含量的方法。这些方法适用于测定 ISO 1629 所列“R”类橡胶中的挥发物含量。这些橡胶具有不饱和碳链，例如天然橡胶和至少部分由二烯烃衍生的合成橡胶。这些方法也适用于其他生橡胶，但在这些情况下，必须证明质量变化仅仅是由于实际挥发物的损失而不是橡胶降解所致。热磨机法不适用于天然橡胶、难以在热磨机上处理的合成橡胶或粉末或碎片形式的合成橡胶。这两种方法不一定能得到相同的结果。因此，如有争议，以烘箱法（程序 A）为参考方法。注：每种测试方法对各种类型橡胶的适用性总结在附录 A 中。 [外文原描述]： This document specifies two methods for the determination of volatile-matter content in raw rubbers by using a hot mill or an oven. These methods are applicable to the determination of the volatile-matter content in the “R” group of rubbers listed in ISO 1629. These are rubbers having an unsaturated carbon chain, for example natural rubber and synthetic rubbers derived at least partly from di-olefins. These methods can also be applicable to other raw rubbers, but in these cases it is necessary to demonstrate that the change in mass is due solely to loss of actual volatile matter and not to rubber degradation. The hot-mill method is not applicable to natural rubber, to synthetic rubbers which are too difficult to handle on a hot mill or to synthetic rubbers in powder or chip form. The two methods do not necessarily give identical results. Therefore, in the case of dispute, the oven method, procedure A, is the reference method. NOTE The applicability of each test method to various types of rubber is summarized in Annex A.