Spectrochim Acta A Mol Biomol Spectrosc. 2008 Mar;69(3):1053-5. Epub 2007 Jun 29.

N-Methylmorpholine-N-oxide ring cleavage registration by ESR under heating conditions of the Lyocell process.

Konkin A, Wendler F, Meister F, Roth HK, Aganov A, Ambacher O.

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Technical University of Ilmenau, Institute for Micro and Nanotechnologies, Gustav-Kirchhoff-Str. 7, D-98693 Ilmenau, Germany.

Abstract

Thermal cleavage processes of N-methylmorpholine-N-oxide monohydrate (NMMO) were observed in pure NMMO as well as in cellulose/NMMO solutions by ESR at temperatures of the industrial Lyocell process ( approximately 370K). Generated radicals were attributed to the alkylnitroxyl type radicals -CH(2)-NO-CH(3) in NMMO and additional (and dominated) -CH(2)-NO-CH(2)- in cellulose/NMMO solutions. Formation of both radical types formed due to NMMO ring scission is suggested.

PMID:: 17686653; [PubMed - indexed for MEDLINE]

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N-Methylmorpholine-N-oxide ring cleavage registration by ESR under heating conditions of the Lyocell process.

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