Journal article
Determination of moisture content of polyamide 66 directly from combination region near-infrared spectra
Journal of applied polymer science, Vol.131(16), 40645
08/15/2014
DOI: 10.1002/app.40645
Abstract
The hygroscopic nature of polyamide (PA) polymers motivates the development of analysis tools for use in assessing their moisture content. Among possible analysis techniques, near-infrared (near-IR) spectroscopy is non-destructive, requires little or no sample preparation, and is compatible with sample thicknesses on the order of mm. The work reported here makes use of transmission near-IR spectroscopy in the combination region (5000–4000 cm−1) to develop a protocol for assessing the moisture content of PA 66 samples directly from their spectral intensities after preprocessing with the standard normal variate transform and partial least-squares. The method is compatible with online or continuous monitoring applications and can be calibrated without the use of destructive reference measurements such as thermogravimetric analysis. The long-term calibration performance of the technique is evaluated, and on a scale of 0–100% moisture uptake, the standard error of prediction is found to average 1.4% over 6 months.
Details
- Title: Subtitle
- Determination of moisture content of polyamide 66 directly from combination region near-infrared spectra
- Creators
- Chamathca P. S Kuda-Malwathumullage - Department of Chemistry and Optical Science and Technology Center, University of Iowa, Iowa, 52242, Iowa CityGary W Small - Department of Chemistry and Optical Science and Technology Center, University of Iowa, Iowa, 52242, Iowa City
- Resource Type
- Journal article
- Publication Details
- Journal of applied polymer science, Vol.131(16), 40645
- Publisher
- Blackwell Publishing Ltd
- DOI
- 10.1002/app.40645
- ISSN
- 0021-8995
- eISSN
- 1097-4628
- Number of pages
- 10
- Language
- English
- Date published
- 08/15/2014
- Academic Unit
- Chemistry
- Record Identifier
- 9984083827002771
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