Mapping Orientation Distribution of Talc Particles in Polypropylene by Small-Angle X-ray Scattering Tomography
Small-angle X-ray scattering tomography has for the first time been used to
investigate the spatially resolved orientation distribution of talc particles in a
sample of injection molded isotactic polypropylene, where the particles had a
preferred orientation along the axis of the injection. The scattering patterns
in the direction perpendicular to the rotation axis of the tomography scan
were used to retrieve the orientation distribution in a 2D cross section of the
Two different methods are presented, one using a numerical approach of
simulated annealing and one method using a linear set of equations to find
the distances the X-ray beam travels through the different orientation regions.
The method of simulated annealing showed little to no promise in
retrieving the orientation distribution while the method using a linear set
of equations is successful at retrieving the main features of the orientation
distribution. The resolution is however not yet good enough to distinguish
fine details inside the sample.
It is believed that with further work on the model used and additional constraints
on the reconstruction algorithm higher precision in the retrieved
orientation distribution can be achieved.
Place, publisher, year, edition, pages
Institutt for fysikk , 2013. , 95 p.
IdentifiersURN: urn:nbn:no:ntnu:diva-23619Local ID: ntnudaim:10229OAI: oai:DiVA.org:ntnu-23619DiVA: diva2:678348
Breiby, Dag Werner, Førsteamanuensis