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Trace element status of activated charcoals and carbon black: Influence on thermal stability of modified lyocell solutions
Author(s) -
Wendler Frank,
Lepri Fabio G.,
Borges Daniel L. G.,
Araujo Rennan G. O.,
Welz Bernhard,
Meister Frank
Publication year - 2010
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.31886
Subject(s) - thermal stability , inductively coupled plasma atomic emission spectroscopy , carbon black , chemistry , lyocell , inductively coupled plasma , analytical chemistry (journal) , graphite , cellulose , materials science , carboxymethyl cellulose , sodium hydroxide , thermal analysis , hydroxide , inorganic chemistry , thermal , chromatography , sodium , thermodynamics , natural rubber , plasma , organic chemistry , physics , quantum mechanics , fiber
The influence of surface‐active additives on the thermal stability of cellulose/ N ‐methylmorpholine‐ N ‐oxide monohydrate solutions were investigated. The application of a dynamic mixing tool incorporating the additive directly before the forming module enhances the thermal stability. Thermal stabilization by means of a polymeric stabilizer system and adjusting the pH value by sodium hydroxide increased the storage life‐time for the additive suspension as revealed by calorimetric isoperibolic step measurements. Further investigations concerned the analysis of the trace element status of the additives. Analytical results for 16 elements have been obtained by inductively coupled plasma optical emission spectrometry (ICP OES) after microwave‐assisted acidic digestion, and seven elements, Cr, Cu, Fe, Mn, Mo, Ni, and V have been determined using direct solid sampling high‐resolution continuum source graphite furnace AAS (SS‐HR‐CS GF AAS) as a reference method. Partial least squares regression between measured and calculated temperatures for beginning exothermicity ( T on ) has been used to investigate the prediction capability of the investigated techniques. Whereas the ICP OES measurement gives only an acceptable correlation employing all 16 metals plus Fe(II), results obtained by SS‐HR‐CS GF AAS exhibit a correlation coefficient of 0.99. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010