红外光谱法定量测定聚异戊二烯橡胶顺式-1,4-结构含量

Quantitative Determination of Cis-1,4 Structure Content of IR by Infrared Spectroscopy

研究红外光谱法测定聚异戊二烯橡胶(IR)的顺式-1,4-结构含量。结果表明,通过测定红外光谱中顺式-1,4和3,4-结构双键上碳-氢键变角振动吸收峰的积分面积,并与核磁共振氢谱测定的二者比值相比较,确定二者红外光谱特征峰出峰效率校正因子,计算得出IR的顺式-1,4-结构含量。红外光谱法定量分析IR顺式-1,4-结构含量操作简单、快捷,结果准确。

This paper presents a testing method to quantitatively determine the cis-1,4 structure content of IR by infrared spectroscopy. The C—H absorption peak areas of double bond in both cis-1,4 and 3,4 structures were measured and calibrated with 1H NMR measurement result. With the calibration factor,the cis-1,4 structure content was calculated. This method is simple,fast,and accurate.