To investigate the correlation between mechanical properties and structural changes in polymer materials a special procedure was developed.
The deformation and fracture are pinpoined at a well defined position of the specimen by a special specimen geometry, the waisted specimen. The dimensions of the specimen can be scaled.
The local deformation is estimated by a grating technique [ARAMIS, GOM]
Tensile and compression strain of a waisted PE-specimen
The local structure is estimated by (scanning) SAXS and WAXS. To get sufficient intensity resp. rates the measurements were performed mainly at synchrotron radiation sources
Mobile arrangement of a tensile rig to be used at the synchrotron
In the following there are shown 3 pattern as well as the evaluated cord distribution functions of iPP at 55 degree. Always shown before defomation, during yielding (local shear deformation) and strain hardening
