酸消化法测定与高不饱和橡胶并用的低不饱和橡胶

Determination of Low Unsaturated Rubber in Its Blend with High Unsaturated Rubber by Acid Digestion

采用严格控制的酸消化法有选择性地消化高不饱和橡胶，再借助裂解气相色谱法或红外光谱法和热裂解法对并用胶中的低不饱和橡胶进行定性、定量测定。采用此方法可以在ＥＰＤＭ和ＩＲ并用比例低于２０％时鉴定出它的存在。

The high unsaturated rubber in the blend is digested selectively by the severe acid digestion and the low unsaturated rubber in the blend is qualitatively and quantitatively determined by decomposition gas chromatography or infra red spectroscopy and thermolysis.The presence of EPDM or IIR and their exact content can be determined by the said method when the proportion of EPDM or IIR is lower than 20%.