[섬유] Deformation Processes in Regenerated Cellulose Fibers 출판일 : 2001.02.01 저자 : S. J. Eichhorn, R. J. Young, and W.-Y. Yeh 서지사항 : Textile Research Journal, Volume 71, Issue 2, 121페이지 등록일 : 2012.10.30 I 조회수 : 70 작성자 : admin |
Molecular deformation processes of regenerated cellulose fibers are investigated using
Raman spectroscopy. These fibers have well-defined Raman spectra, and the main Raman
bands in the region of 895 to 1170 cm-1 shift to lower wavenumbers upon application of
tensile strain and stress. The peak positions of the Raman bands at 895 and 1095 cm-1
show an approximately linear relationship with strain and stress. For fibers with lower
moduli and more nonlinearity in their stress-strain curves, there is poorer correlation with
strain and stress, consistent with mechanical data and structural characteristics. Also, the
strain sensitivity of the Raman band strain shift (in cm-1/%) increases with the Young's
modulus of regenerated cellulose fibers, and there is a universal stress band shift of about -
4 cm-1/GPa for both bands, consistent with a modified series model of deformation.
Deviations from this model for lower fiber moduli are discussed with evidence to suggest
that chain slippage and re-orientation behavior dominate.
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