| Autor: |
R, Peters, Y, Mengerink, S, Langereis, M, Frederix, H, Linssen, J, van Hest, Sj, van der Wal |
| Rok vydání: |
2002 |
| Předmět: |
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| Zdroj: |
Journal of chromatography. A. 949(1-2) |
| ISSN: |
0021-9673 |
| Popis: |
Atom transfer radical polymerisation (ATRP) is a versatile 'living' controlled polymerisation technique for the synthesis of well-defined architectures such as block copolymers, gradient copolymers, hyperbranched polymers and telechelic polymers. ATRP provides control over molecular mass and molecular mass distribution and is suitable for the polymerisation of a wide variety of monomers, including methyl methacrylate. A chromatographic method was developed for an endgroup-based separation of low-molecular-mass poly(methyl methacrylate) (PMMA), based on liquid chromatography under critical conditions. With this method the PMMA, irrespective of its low-molecular-mass, is separated according to endgroups (functionality) due to interactions of the polar endgroups with the non-modified silica based stationary phase. The different series were identified using on-line atmospheric pressure ionisation electrospray mass spectrometry and quantified by evaporative light scattering detection. These results were compared with those obtained by NMR and titration. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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