Raman Spectroscopy Determination of the Thermoplastic Content within Epoxy Resin-Copolyethersulfone Blends
| Autor: | E van Overbeke, JT Carter, Roger Legras, Jacques Devaux, V. Carlier, PT McGrail |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Materials science
Thermoplastic Analytical chemistry 02 engineering and technology 01 natural sciences chemistry.chemical_compound symbols.namesake Diamine Polymer chemistry Calibration Methylene Instrumentation Spectroscopy Curing (chemistry) chemistry.chemical_classification 010401 analytical chemistry Epoxy 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry visual_art symbols visual_art.visual_art_medium Polymer blend 0210 nano-technology Raman spectroscopy |
| Zdroj: | Applied Spectroscopy. 55:1514-1522 |
| ISSN: | 1943-3530 0003-7028 |
| DOI: | 10.1366/0003702011953748 |
| Popis: | The possibility of using Raman spectroscopy to determine the local thermoplastic content within blends of epoxy resins and copolyethersulfone was studied. The required calibration of the Raman data is presented here. It was obtained by multivariate methods and was based on homogeneous samples of known content in amine-ended thermoplastic (expressed in weight %). Blends cured with two types of diamine curing agents were separately studied, the curing agents being the methylene bis(2,6-diethylaniline) (MDEA) and the 4,4′-diaminodiphenylsulfone (DDS). Partial least-squares (PLS) regressions with external validation were performed. With MDEA, root mean square error of prediction (RMSEP) values at validation were 3.2, 3.7, and 3.0% (depending on the spectral pre-treatment and on the wavenumber selection). RMSEP values were 2.4 or 3.0% with DDS (depending on the wavenumber selection). The applicability of the calibrations to blends containing chlorine-ended copolyethersulfone is discussed. Results obtained with small or large Raman confocal holes are also compared. |
| Databáze: | OpenAIRE |
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