FTIR法分析PC/ABS共混物中PC含量

The Quantification Analysis of Polycatbonate in PC/ABS by FTIR

采用傅立叶变换红外光谱(FTIR)法对聚碳酸酯(PC)/丙烯腈–丁二烯–苯乙烯塑料(ABS)共混物中PC组分含量进行分析。分别以1 760 cm^(–1)和700 cm^(–1)作为PC和ABS的特征定量吸收峰,建立了1 760 cm^(–1)和700 cm^(–1)吸收峰峰面积比值与PC组分含量的关系。结果表明,在PC质量分数低于80%时,两者呈一次线性关系,相关系数达0.995。与常规的密度法相比,FTIR法定量结果的相对偏差和相对标准偏差均在5%以内,可准确应用于PC/ABS共混物中PC含量的定量分析。

The quantification analysis of polycarbonate (PC) in PC/acrylonitrile butadiene styrene (ABS) blend was created by Fourier transform infrared spectroscopy (FTIR),1760 cm–1 and 700 cm–1 were defined as the absorbance peak of PC and ABS,respectively. The relationship between the ratio of absorbance peak area of 1 760 cm–1 and 700 cm–1 and concentration of PC was established. It is found that when PC is no more than 80%,the relationship is linear with correlation coefficient of 0.995. Compared to the density method,the relative deviation and relative standard deviation of the quantification of PC in PC/ABS by FTIR are both less than 5%. FTIR can be an accurate method for PC/ABS analysis.