| Autor: |
Robert N. Feudale, Charles N. McEwen, Elisabeth Hauptman, Murray V. Johnston, Frederick J. Cox |
| Rok vydání: |
2002 |
| Předmět: |
|
| Zdroj: |
Journal of Analytical and Applied Pyrolysis. 64:305-312 |
| ISSN: |
0165-2370 |
| DOI: |
10.1016/s0165-2370(02)00040-2 |
| Popis: |
Pyrolysis-photoionization mass spectrometry with coherent vacuum-ultraviolet radiation was used to study ethylene-methyl acrylate copolymers having a wide range of compositions and molecular weights. Samples were pyrolyzed under vacuum with a fast heating rate of ≈4 °C s −1 in the source of the mass spectrometer. The mass spectra were found to reflect changes in the methyl acrylate incorporation, though not in a straightforward fashion. Chemometric analysis (Partial Least Squares) was performed on the spectra in order to create a model for prediction of copolymer composition in the range of 2.8 mol.% methyl acrylate to 20.5%. The method was found to determine copolymer composition accurately and expediently, though with limited ability to discriminate against blends of copolymer with homopolymers of either component. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect