1.1 本试验方法涵盖苯乙烯含量的测定，适用于通过乳液法制备的固体未粘合苯乙烯-丁二烯共聚物，通常称为SBR。在溶液中制备的SBR聚合物将需要使用不同的折射率表，因为丁二烯的乙烯基含量与乳液聚合物中的不同。它适用于小于55的聚合物 % 结合苯乙烯。 注1: 本试验方法中使用的命名法符合规程 D1418 。 1.2 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.3 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ===意义和用途====== 4.1 结合苯乙烯测试是对橡胶的结合单体组成的测量。它可用于检查单体加料的准确性，也可用于指导产品的均匀性，因为结合的苯乙烯含量会影响物理性能。

1.1 This test method covers the determination of styrene content, and is intended for general use on solid uncompounded styrene-butadiene copolymers, commonly referred to as SBR, prepared by the emulsion process. SBR polymers prepared in solution will require the use of different refractive index tables because the vinyl content of the butadiene differs from that in the emulsion polymers. It is applicable to polymers having less than 55 % bound styrene. Note 1: The nomenclature used in this test method is in accordance with Practice D1418 . 1.2 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. 1.3 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 ====== 4.1 The bound styrene test is a measure of the bound monomeric composition of the rubber. It is used as a check on the accuracy of monomer charging and also as a guide to the uniformity of the product, since the bound styrene content affects the physical properties.