This paper presents an application of near infrared spectroscopy associated with partial least squares regression calibration, for ash content analysis of prepreg in the manufacturing progress of copper clad laminate for printed circuited boards. The performance of the model was assessed by cross validation and external validation. The correlation coefficient and the root mean squared error of calibration and validation were 0.99, 0.25% and 0.98, 0.34%, and the measurement process was accomplished in less than 2 min compared to over 60 min for traditional thermo gravimetric analyzsis. The paired t-test results revealed that there was no significant difference between the two methods.
DuemichenEJavdanitehranMErdmannM, et al.Analyzing the network formation and curing kinetics of epoxy resins by in situ near-infrared measurements with variable heating rates. Thermochim Acta2015; 616: 49–60.
2.
MonojPSharathkumarKMJamesWR. Determination of epoxy equivalent weight of glycidyl ether based epoxides via near infrared spectroscopy. Polym Test2012; 31: 716–721.
3.
WangHYYuanYChiZF, et al.Researches on silane coupling agent treated AlN ceramic powder and fabrication of AlN/PTFE composites for microwave substrate Applications. J Mater Sci Mater Electronics2019; 30: 20189–20197.
4.
YuanYWangJYaoM, et al.Influence of SiO2 addition on properties of PTFE/TiO2 microwave composites. J Elecronic Mater2018; 47: 633–640.
5.
JiangBHuangYDLiuL, et al.Use of near-infrared spectroscopy for online quality analysis of armos fiber/prepreg tape. J Appl Polym Sci2012; 125: 2485–2488.
6.
LiWHuangYDLiuL, et al.Rapid and nondestructive analysis of quality of prepreg cloth by near-infrared spectroscopy. Composites Sci Technology2005; 65: 1668–1674.
7.
BarbasJMMachadoAVCovasJA. In-line near-infrared spectroscopy for the characterization of dispersion in polymer-clay nanocomposites. Polym Test2012; 31: 527–536.
8.
MizushimaMKawamuraTTakahashiK, et al.In situ near-infrared spectroscopic studies of the structural changes in polyethylene during tensile deformation. Polym Test2014; 38: 81–86.
9.
AsmussenSSchroederWDell’ErbaI, et al.Monitoring of visible light photopolymerization of an epoxy dimethacrylate hybrid system by Raman and near-infrared spectroscopies. Polym Test2013; 32: 1283–1289.
10.
BlancoMVillaescusaV. Use of NIR spectroscopy in the production of modified industrial resins. Tal Anta2007; 71: 1333–1338.
11.
AnaHMiguelGNadiaP, et al.Determination of resin and moisture content in melamine-formaldehyde paper using near infrared spectroscopy. J Near Infrared Spectrosc2017; 25: 311–323.
12.
WuJG. Technology and applications of Fourier transform infrared spectrometry. Beijing, China: Scientific and Technical Documentation Press, 1994.
13.
WorkmanJWeyerL. Practical guide and spectral atlas for interpretive near-infrared spectroscopy. 2nd edition. Boca Raton, FL: CRC Press, 2012.
14.
MilicaPJasnaMDraganP, et al.The development of near-infrared spectroscopy (NIRS) calibration for prediction of ash content in legumes on the basis of two different reference methods. Polym Test2016; 49: 15–21.
15.
YusufSJamesD. Determination of polymer blends composed of polycarbonate and rubber entities using near-infrared (NIR) spectroscopy and multivariate calibration. Polym Test2013; 32: 802–809.
16.
HelenaIMMariaJNCBordadoCM. Multivariate near infrared spectroscopy models to monitor polycondensation production process reactions. Eur Polym J2015; 66: 12–17.
