1.1本试验方法涵盖了一种评估参数的技术，该参数来自标准氢化丁腈橡胶（HNBR）配方的硫化仪测试，与HNBR的残余不饱和度百分比有关。全面描述了标准材料、试验配方和混合程序。本试验方法适用于未硫化状态下的所有等级的HNBR。 1.2由UP指定的不饱和度参数的评估基于从两个硫化仪参数的测量值与试验方法D5670定义的红外分光光度法测量的不饱和度百分比得出的特殊回归方程。用于此目的的数据包含在附录X1中。 1.2.1使用硫化计和标准配方评估HNBR中的残余不饱和度具有相对简单的优点，可用于大多数橡胶测试实验室。 缺点在于HNBR不饱和度与焦烧时间tS1和最大硫化仪扭矩MH的测量硫化仪参数之间存在非线性关系。 1.2.2使用UP，其根据焦烧时间参数和最大扭矩参数计算，这两个参数均从表A1.1中获得，与不太确定的简单排序技术相比，允许建立一组HNBR样品之间不饱和水平的更真实关系。排序技术并不确定，因为固化仪参数和不饱和度之间的关系是高度非线性的。与一系列样品在高真实不饱和度下的排名相比，一系列HNBR样品在低真实不饱和度下的排名可能会给出橡胶组之间不饱和度差异的误导性指示。 1.2.3如果已知被测HNBR样品的不饱和度百分比，则可使用其计算未知HNBR样品的近似不饱和度（百分比）。 1.3实验室内部和实验室之间的混合和固化仪测试变化可能会影响通过本试验方法获得的结果。实验室内测试的这些变化较小。 1.4本标准无意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和健康实践，并确定监管限制的适用性。

1.1 This test method covers a technique for evaluating a parameter, derived from curemeter testing of a standard hydrogenated nitrile rubber (HNBR) formulation, that is related to the percent residual unsaturation of the HNBR. The standard materials, test formulation, and mixing procedure are fully described. This test method is applicable to all grades of HNBR in the raw unvulcanized state. 1.2 The evaluation of the unsaturation parameter, designated by UP, is based on special regression equations developed from the measured values for two curemeter parameters versus the percent unsaturation measured by infrared spectrophotometry as defined by Test Method D5670. The data used for this are contained in Appendix X1. 1.2.1 The use of a curemeter and a standard formulation to evaluate the residual unsaturation in HNBR has the advantage of being a relatively simple test, available to most rubber testing laboratories. The disadvantage lies in the nonlinear relationship between HNBR unsaturation and the measured curemeter parameters of scorch time, tS1 and maximum curemeter torque, MH. 1.2.2 The use of UP, which is calculated from a scorch time parameter and a maximum torque parameter, both of which are obtained from Table A1.1 permits the development of a more realistic relationship of the unsaturation levels among a group of HNBR samples than the less definitive technique of simple ranking. The ranking technique is not definitive because the relationship between the curemeter parameters and the unsaturation is highly nonlinear. Curemeter ranking of a series of HNBR samples at low true unsaturation compared to the ranking of a series of samples at high true unsaturation, may give misleading indications of unsaturation differences among the group of rubbers. 1.2.3 If, the unsaturation in percent of a tested HNBR sample is known, it can be used to calculate the approximate unsaturation (in percent) of unknown HNBR samples. 1.3 Mixing and curemeter testing variations, both within and between laboratories, may influence the results as obtained by this test method. These variations will be smaller for within-laboratory testing. 1.4 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 and health practices and determine the applicability of regulatory limitations prior to use.