ISSN:
0021-8995
Schlagwort(e):
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Maschinenbau
,
Physik
Notizen:
Poplar wood was steam exploded under various experimental conditions (230°C, 120-360 sec) and was then dissolved in dimethylacetamide-lithium chloride (DMAc-LiCl). Solutions of different concentrations (cp 4-10%) were obtained without any activation. Mesophases were not formed in any of the conditions tested. The good spinnability of the solutions led to wood fibers that were evaluated in terms of physico-mechanical properties and morphological and supramolecular characteristics. The tensile strength and the modulus of the wood fibers, improved through delignification treatments, were comparable to those of conventional rayons. After annealing treatments at 260°C in protic solvent, X-ray and CP MAS 13C-NMR experiments revealed evidence of a marked modification of the fiber supramolecular structure. © 1994 John Wiley & Sons, Inc.
Zusätzliches Material:
5 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/app.1994.070510401
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