Synthesis and13C CP MAS NMR spectroscopy of cellulose-graft-poly(N-acetylethylenimine)
| Autor: | Heinrich Gruber, Wolfgang H. Binder, Ursula Mais, Simone Knaus |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
chemistry.chemical_classification
Mas nmr spectroscopy Polymers and Plastics Organic Chemistry Polymer Condensed Matter Physics Grafting Ring-opening polymerization chemistry.chemical_compound Monomer chemistry Tosyl Polymer chemistry Materials Chemistry Molecule Physical and Theoretical Chemistry Cellulose |
| Zdroj: | Macromolecular Chemistry and Physics. 201:2115-2122 |
| ISSN: | 1521-3935 1022-1352 |
| Popis: | Starting from homogeneously prepared tosyl celluloses with DS Tos values ranging from 0.2 to 1.8 poly(N-acetylethylenimine) was grafted onto the cellulose backbone. Tosyl moieties served as starting centers for the living ring opening polymerization using 2-methyl-1,3-oxazoline as the monomeric unit. The grafted products could be characterized by IR and 13 C CP MAS NMR spectroscopy clearly indicating the loss of tosyl moieties as well as the occurrence of the N-acetylethylenimine residues. 13 C CP MAS NMR spectroscopy was also found to be an efficient tool for the quantification of grafted polymer after determination of the relaxation behavior of the various nuclei. Thus the grafting efficiency could be controlled by the DS Tos of the starting tosyl celluloses, whereas the amount of monomers showed only a minor influence on the grafting density. |
| Databáze: | OpenAIRE |
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