1.1 本规程涵盖了通过热解产物（热解图）的气相色谱图，基于单个聚合物识别未加工橡胶中的聚合物以及固化和未固化化合物。实施本指南的前提是具备气相色谱原理和技术的工作知识，足以实施本实践并正确解释结果。 2. 1.2 本规程将确定以下聚合物: 1.2.1 天然或合成的聚异戊二烯， 1.2.2 丁二烯-苯乙烯共聚物， 1.2.3 聚丁二烯， 1.2.4 氯丁橡胶， 1.2.5 丁二烯-丙烯腈共聚物， 1.2.6 乙烯-丙烯共聚物和相关三元共聚物，以及 1.2.7 异丁烯-异戊二烯共聚物。 1.3 本规程不会区分以下聚合物: 1.3.1 天然聚异戊二烯来自合成聚异戊二烯。 1.3.2 通过溶液聚合和乳液聚合生产的丁二烯-苯乙烯共聚物。有时可以将含有不同数量苯乙烯以及无规聚合物的丁二烯-苯乙烯共聚物与嵌段聚合物区分开来。 1.3.3 不同微观结构的聚丁二烯。 1.3.4 不同类型的氯丁橡胶。 1.3.5 不同单体配比的丁二烯-丙烯腈共聚物。 1.3.6 具有不同单体比率的乙烯-丙烯共聚物，以及来自相关三元共聚物的共聚物。 1.3.7 来自卤化丁基橡胶的异丁烯-异戊二烯共聚物（丁基橡胶）。 1.3.8 含有不同量的聚异戊二烯 顺反式 异构体。 1.3.9 本规程不确定硬橡胶或硬质橡胶。 1.4 以国际单位制表示的数值应视为标准值。括号中给出的值仅供参考。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 3.1 出于研究、开发和质量控制目的，确定固化、复合产品中橡胶的成分是有利的。 3.2 本规程利用气相色谱仪和橡胶分解的热解产物进行此类成分分析。

1.1 This practice covers the identification of polymers in raw rubbers, and cured and uncured compounds, based on a single polymer, by the gas chromatographic patterns of their pyrolysis products (pyrograms). Implementation of this guide presupposes a working knowledge of the principles and techniques of gas chromatography, sufficient to carry out this practice and to interpret the results correctly. 2 1.2 This practice will identify the following polymers: 1.2.1 Polyisoprene of natural or synthetic origin, 1.2.2 Butadiene-styrene copolymers, 1.2.3 Polybutadiene, 1.2.4 Polychloroprene, 1.2.5 Butadiene-acrylonitrile copolymers, 1.2.6 Ethylene-propylene copolymers and related terpolymers, and 1.2.7 Isobutene-isoprene copolymers. 1.3 This practice will not differentiate the following polymers: 1.3.1 Natural polyisoprene from synthetic polyisoprene. 1.3.2 Butadiene-styrene copolymers produced by solution and emulsion polymerization. It is sometimes possible to distinguish butadiene-styrene copolymers containing different amounts of styrene as well as random polymers from block polymers. 1.3.3 Polybutadiene with different microstructures. 1.3.4 Different types of polychloroprenes. 1.3.5 Butadiene-acrylonitrile copolymers with different monomer ratios. 1.3.6 Ethylene-propylene copolymers with different monomer ratios, as well as the copolymers from the related terpolymers. 1.3.7 Isobutene-isoprene copolymers (butyl rubbers) from halogenated butyl rubbers. 1.3.8 Polyisoprene containing different amounts of cis-trans isomers. 1.3.9 The practice does not identify ebonite or hard rubbers. 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 3.1 For research, development, and quality control purposes, it is advantageous to determine the composition of rubbers in cured, compounded products. 3.2 This practice provides such composition analysis, utilizing a gas chromatograph and pyrolysis products from rubber decomposition.