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Synthesis and 13 C CP MAS NMR spectroscopy of cellulose‐ graft ‐poly( N ‐acetylethylenimine)
Author(s) -
Mais Ursula,
Binder Wolfgang H.,
Knaus Simone,
Gruber Heinrich
Publication year - 2000
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20001101)201:16<2115::aid-macp2115>3.0.co;2-n
Subject(s) - monomer , polymer chemistry , grafting , tosyl , cellulose , chemistry , nuclear magnetic resonance spectroscopy , polymerization , polymer , organic chemistry
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 monomer showed only a minor influence on the grafting density.