Comparison of molecular orientation and mechanical properties of lyocell fibre tow and staple fibres

Autor: Wolfgang Gindl, Jozef Keckes, Ramesh Babu Adusumalli, Thomas Roeder, Klaus J. Martinschitz, Hedda K. Weber, Herbert Sixta, Peter Boesecke
Rok vydání: 2009
Předmět:
Zdroj: Cellulose. 16:765-772
ISSN: 1572-882X
0969-0239
DOI: 10.1007/s10570-009-9292-2
Popis: Samples of lyocell fibres were taken in the form of filaments from fibre tow of potentially infinite length and in their final condition of staple fibres. Mechanical testing showed comparable tensile strength, but a 50% lower modulus of elasticity for staple fibres and a higher elongation at break compared to filaments from fibre tow. Structural investigation by means of synchrotron wide angle X-ray scattering and birefringence measurement revealed a significantly lower degree of preferred orientation together with less fibre straightness for staple fibres than for filaments. It is concluded that plastic deformation during the processing of staple fibres from filaments induces permanent changes in the orientation of cellulose chains in the fibres, which in turn is responsible for the observed differences in mechanical performance.
Databáze: OpenAIRE
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