摘要
采用衰减全反射(ATR)-傅里叶变换红外光谱(FTIR)法测试丁腈橡胶(NBR)的结合丙烯腈含量,并以燃烧法测得的结合丙烯腈含量为标准值,绘制FTIR谱特征峰吸光度比值与NBR中结合丙烯腈含量的标准工作曲线。结果表明,FTIR谱中波数为2 240和1 440 cm^(-1)处的特征峰的吸光度比值(A_(2240)/A_(1440))与NBR中结合丙烯腈含量具有很好的线性关系,根据FTIR谱的A_(2240)/A_(1440)可以计算得到NBR中结合丙烯腈含量。ATR-FTIR法操作简单快捷,测试结果与燃烧法测试结果的误差不大于1.3%,准确度高。
In this study, the method to determine bound acrylonitrile content of nitrile rubber （NBR） by Fourier transform infrared spectroscopy （ FTIR ） with attenuation total reflection （ ATR ） technic was developed. In order to establish the standard working curve, bound acrylonitrile contents were firstly tested by combustion method, and FTIR spectrums of corresponding NBR materials were also obtained. The results showed that the absorbance ratio （A2240/A1440） of characteristic FTIR peak value at 2 240 and 1 440 cm-1 had a good linear relationship with bound acrylonitrile content determined by combustion method. Thus, for an unknown NBR sample, the bound acrylonitrile content could be obtained by using the ratio of A2240/A1440 and a standard working curve. ATR-FTIR method was simple and fast, and the test results were accurate which showed no more than 1.3% deviation from the testing results of combustion method.
出处
《橡胶科技》
2017年第4期44-46,共3页
Rubber Science and Technology
关键词
衰减全反射法
傅里叶变换红外光谱
丁腈橡胶
结合丙烯腈含量
attenuation total reflection method
Fourier transform infrared spectroscopy
nitrile rubber
bound acrylonitrile content
