ISO 11236:2017适用于橡胶工业中使用的各种取代苯二胺抗降解剂（PPD）。PPD的三大类是二烷基、烷基芳基和二芳基，它们用于赋予橡胶耐臭氧性。 以下试验方法对于评估生产PPD的纯度以及其在橡胶中的适用性具有重要意义。本文件中对其规定如下: -用气相色谱法（GC）测定纯度； -用高效液相色谱法（HPLC）测定纯度； -灰分的测定； -挥发性物质的测定。

ISO 11236:2017 applies to a variety of substituted p-phenylenediamine antidegradants (PPDs) used in the rubber industry. The three general classes of PPDs are dialkyl, alkyl-aryl and diaryl, which are used to impart ozone resistance to rubber. The following test methods are of greatest significance in assessing the purity of production PPDs, and hence their suitability for use in rubber. They are specified in this document as follows: - determination of purity by gas chromatography (GC); - determination of purity by high-performance liquid chromatography (HPLC); - determination of ash; - determination of volatile matter.