近红外漫反射分析技术在测定聚丙烯粉料中二甲苯可溶物方面的应用

Determination of Xylene Soluble in Polypropylene Powder by FT Near-infrared Spectroscopy

文章探讨了利用近红外分析技术快速判断聚丙烯粉料中的二甲苯可溶物含量的应用。用近红外漫反射法收集了样品的近红外光谱图。参照化学计量学分析方法测定聚丙烯样品的二甲苯可溶物含量。利用偏最小二乘法线性回归法建立了聚丙烯二甲苯可溶物的近红外光谱预测模型。将近红外法测定结果与化学分析方法测定结果进行了比较,对光谱测量的重复性进行了考察。结果表明,利用近红外光谱法与化学分析法的测定结果无显著差异。

The objective of the study is to investigate the application of using near infrared spectroscopy（NIR） to rapidly predict the content of xylene soluble in polypropylene powder.The sample spectrum collected by near infrared reflectance spectroscopy.The method determinates the content of xylene soluble in polypropylene sample combined with chemometrics analysis.By using a partial least squares（PLS） established the NIR model.Compared the results from NIR and chemometrics method and checked the repeatability,and a good correlation between the measured and predicted values was obtained.