近红外漫反射光谱技术在预浸布质量指标在线测定中的应用

采用近红外漫反射光谱技术对高硅氧/酚醛预浸布的树脂含量、挥发分含量和预固化度等质量指标进行了在线测定。利用偏最小二乘法所建立的树脂含量、挥发分含量和预固化度模型的决定系数R2分别为99.20、99.14和99.11,交叉验证均方差RMSECV分别为0.298、0.144和0.124。利用外部验证集,对模型进行t-检验,在给定显著性水平0.05的情况下,近红外的测定结果和标准方法的测定结果对比,两者不存在显著性差异。该方法在预浸布生产线的应用,为其生产过程中的质量控制提供了一种有效的分析手段。

Application of near infrared diffuse reflection spectrum in on-line determination of prepreg cloth quality index

The resin content,the volatile content and the pr e-curing degree of the silica/phenolic resin prepreg cloth were on-line determ ined by near infrared diffuse reflection spectrum.The determinative coefficient s(R~2) of calibration models of the resin content,the volatile content and the pre-curing degree derived by the partial least square method are 99.20,99.14 and 99.11 respectively;root mean square errors of cross-verification(RMS ECV) are 0.298,0.144 and 0.124 respectively.Based on external verificaion sam ples,the model was analyzed by means of t-verification.Under the given signifi cance level(at 0.05) condition,determination results of near infrared diffuse r eflection spectrum method was compared with that of standard method,and there ex ists no significance difference.The application of near diffuse reflection spec trum method in production line of prepreg cloth can provide an effective method for quality control in the course of production.