Non-destructive method for determination of hydroxyl value of soybean polyol by LS-SVM using HATR/FT-IR

A Primary Method for the Determination of Hydroxyl Value of Polyols by Fourier Transform Mid‐Infrared Spectroscopy

“…From the standpoint of polyols, the most relevant absorptions are the OH stretching and C-OH bending vibrations, which could be used to measure OHV by mid-FTIR spectroscopy. The OH stretching band at between 3700 and 3400 cm -1 [3] is measurable, albeit broad, but is affected by hydroxyl type (1°vs. 2°) [4].…”

“…The FTIR method is not affected by moisture and avoids the requirement to correct for carboxylic acid acidity or amine basicity. Although other FTIR-based methods for the determination of OHV exist [2][3][4]8] these all depend on calibration against a primary reference method and all use sophisticated chemometrics to obtain a calibration, other than the new silylation method [8]. As a result, with the exception of the silylation method, these methods tend to be limited to a restricted universe of samples and are problematic for the general analysis of polyols.…”

“…This near-infrared method requires the use of a range of chemometric tools including multiple linear regression, principal component regression, and/or partial least squares (PLS) regression, to develop calibration models. Other methods based on mid-FTIR spectroscopy have been developed [3,4] using attenuated total reflectance (ATR) accessories. These methods also rely heavily on chemometrics and tend to be relatively insensitive due to the inherently short path length of ATR accessories.…”

Application of support vector machine to rapid classification of uranium waste drums using low-resolution γ-ray spectra

“…SVM has high generalization performance using a hyperplane, providing localized and global solutions, while conventional neural networks often converge on only the local minima. Its feasibility for chemical analysis was previously reported, e.g., for identifying components or structure such as mass spectra (Bern et al, 2004;Hilario et al, 2006;Somorjai et al, 2003), FT-IR spectra (Ferrão et al, 2007), NIR spectra (Chauchard et al, 2004;Chen et al, 2006;Devos et al, 2009), and Raman spectra (Gaus et al, 2006;Ishikawa and Gulick, 2013;Rösch et al, 2005;Sattlecker et al, 2010). However, its feasibility for analyzing radiation spectra is yet to be studied.…”

Preparation and Characterization of Polyurethanes from Spinifex Resin Based Bio-Polymer

“…The vast majority of polyurethane polymers are based on polyols derived from petrochemicals. As an alternative for petroleum-based feedstock, some companies and researchers are exploring and developing bio-based polyols based on plant oils or similar renewable compounds [12][13][14][15][16][17][18][19][20][21][22][23][24]. Acetone extracted resin from threshed spinifex resin mixture is quite soft and sticky at ambient temperatures, but the spinifex resin which is threshed and thermally treated by Australian Indigenous people for manufacturing traditional artifacts, contains plant fibres and possibly other mineral fillers which appear to elevate the glass transition point so that it sets hard at ambient temperatures.…”