A non-destructive and rapid determi-nation of bound styrene content in styrene-butadiene rubber latex was studied using near-infrared spec-troscopy diffuse transmission method combined with chemometrics,bound styrene content in styrene-bu-tadiene rubber latex was determined by refractive index method,near-infrared spectral data of styrene-butadiene rubber latex were collected using Fourier transform near-infrared spectrometer,Kennard-Stone algorithm was used to divide the calibration set and validation set,partial least squares regression quan-titative analysis model was established by combining the spectral preprocessing methods,such as multiple scattering correction method,second-order deriva-tives and Norris smoothing,etc,and the influence of screening spectral feature variables by interval par-tial least squares algorithm on the quantitative ana-lysis model was finally investigated.The results showed that the calibration set correlation coeffi-cient,validation set correlation coefficient,interac-tive validation root mean square error and validation set root mean square error of the established model were 0.988 7,0.818 0,0.357 and 0.319,respec-tively.The method established by combining near-infrared spectroscopy diffuse transmission method with chemometric algorithm could realise non-de-structive and rapid determination of bound styrene content in styrene-butadiene rubber latex,providing the technical support for the application of near-in-frared spectroscopy analysis technology in the field of synthetic rubber intermediate quality control.
关键词
近红外光谱/丁苯胶乳/结合苯乙烯量/化学计量学/无损快速检测/间隔偏最小二乘算法
Key words
near-infrared spectroscopy/styrene-butadiene rubber latex/bound styrene content/chemometrics/non-destructive and rapid determina-tion/interval partial least squares algorithm
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