橡胶 鉴别 红外光谱法

[中文适用范围]： 这个标准是国家采用国际标准ISO 4650（2005年9月版）。该标准规定了两种鉴定橡胶（包括热塑性弹性体）的方法，无论是原始状态还是硫化或非硫化混合物形式。第一种方法是基于使用透射技术的红外光谱检测。第二种方法使用反射率分析。从反射率（ATR 来自英语“衰减全反射率”）和透射率（胶片）获得的光谱的比较两种方法均涉及从热解产物（热解）或从溶液或模塑获得的薄膜（仅适用于生橡胶）开始对聚合物进行分析。附录 B 中报告了典型光谱。指定的方法仅为定性方法。 [外文原描述]： ISO 4650:2012 specifies two methods for the identification of rubbers, including thermoplastic elastomers, either in the raw state or in the form of vulcanized or unvulcanized mixes. The first method is based on infrared spectrometric examination using the transmission technique. The second method makes use of analysis by reflectance. A comparison of the spectra resulting from reflectance (attenuated total reflectance, ATR) and transmission (film) is given. Both methods comprise examination of polymers by their pyrolysis products (pyrolysates), or by films cast from solution or obtained by moulding (for raw rubbers only). Typical spectra are given. The methods specified are qualitative methods only.