Journal of Materials Science

, Volume 44, Issue 2, pp 655–663 | Cite as

X-ray diffraction investigations of α-polyamide 6 films: orientation and structural changes upon uni- and biaxial drawing

  • H. Shanak
  • K.-H. Ehses
  • W. Götz
  • P. Leibenguth
  • R. PelsterEmail author


We have investigated the influence of drawing on orientation, crystallinity, and structural properties of polyamide 6 films using X-ray diffraction. The samples were uniaxially and biaxially stretched resulting in the formation of monoclinic crystallites (α-form) in the size range of 8–10 nm. Depending on the drawing ratio, a degree of crystallinity of up to 60% is obtained. The average orientation of the crystallite axes was evaluated using the pole figure technique. The b*-axis, which corresponds to the chain direction of the polyamide molecules, lies in the film plane and shows a preferred orientation upon drawing. For uniaxial drawing, b* aligns with the drawing direction. For biaxially drawn films, which were prepared using the sequential stretching method, the second drawing determines the orientation of b*, at least at the center of the films. At the sides, b* is located between the two drawing directions reflecting the inhomogeneous distribution of mechanical stress during stretching.


Pole Figure Drawing Ratio Average Orientation Machine Direction Drawing Direction 


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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • H. Shanak
    • 1
  • K.-H. Ehses
    • 1
  • W. Götz
    • 2
  • P. Leibenguth
    • 3
  • R. Pelster
    • 1
    Email author
  1. 1.Experimentalphysik, FB7.2Universität des SaarlandesSaarbrückenGermany
  2. 2.BASF SE CompanyLudwigshafenGermany
  3. 3.WerkstoffwissenschaftenUniversität des SaarlandesSaarbrückenGermany

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