ISO 7270-2:2024 橡胶 裂解气相色谱分析法 第2部分：苯乙烯/丁二烯/异戊二烯比率的测定

标准编号：ISO 7270-2:2024

中文名称：橡胶 裂解气相色谱分析法 第2部分：苯乙烯/丁二烯/异戊二烯比率的测定

英文名称：Rubber — Analysis by pyrolytic gas-chromatographic methods — Part 2: Determination of styrene/butadiene/isoprene ratio

发布日期：2024-05

标准范围

本文件规定了用于测定共聚物或均聚物和/或共聚物的共混物、生胶或未硫化或硫化化合物中的苯乙烯/丁二烯/异戊二烯比率的热解气相色谱法。它适用于由苯乙烯、丁二烯和异戊二烯组成的共聚物/三元共聚物，以及这些聚合物的共混物。笔记？1？使用本文件的前提是分析员具备足够的气相色谱原理和技术的工作知识，以执行所述操作并正确解释结果。笔记？2？通过该测试方法测定的苯乙烯/丁二烯/异戊二烯比率受树脂的存在和高水平的硫的影响。

This document specifies a pyrolytic gas-chromatographic method for the determination of the styrene/butadiene/isoprene ratio in copolymers, or blends of homopolymers and/or copolymers, in raw rubbers or in unvulcanized or vulcanized compounds. It is applicable to copolymers/terpolymers consisting of styrene, butadiene and isoprene, and blends of these polymers.

NOTE 1        The use of this document pre-supposes sufficient working knowledge of the principles and techniques of gas chromatography for the analyst to perform the operations described and interpret the results correctly.

NOTE 2        The styrene/butadiene/isoprene ratio determined by this test method is affected by the presence of resin and by a high level of sulfur.

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