Statistical ultrasonic characterization of particulate filler in polymer compounds

Wöckel, Sebastian; Arndt, H.; Steinmann, Ulrike; Auge, J.; Dietl, Kilian; Schober, G.; Kügler, Christoph; Hochrein, Thomas

doi:10.1109/ultsym.2016.7728747

Cited by 2 publications

(1 citation statement)

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“…In the same manner, the distribution of particles also has an influence on the attenuation of the US signal. Therefore, the filler size distribution and agglomerate formation can be determined as well (Alig et al, 2006;Schober et al, 2014;Wöckel et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Ultrasound tomography for inline monitoring of plastic melts

Halmen

Kügler

Hochrein

et al. 2017

J. Sens. Sens. Syst.

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Abstract. The inline determination of process and product parameters is of great help for the evaluation and optimization of new procedures. Therefore, an ultrasound process tomography system has been developed, which enables the imaging of the local filler distribution in plastic melts. The objects investigated were extruded rods made of polypropylene (PP) with radial filler gradients. During extrusion, sound velocity and attenuation of the plastic melt were determined and processed via a modified reconstruction algorithm according to Radon transform into 2-D sectional images. Despite the challenges of higher attenuation and impedance mismatch of 60 mm filled PP melt compared to water, the resulting images are of good quality. An important factor for the image quality after tomographic reconstruction is the opening angle of the used ultrasound transducers. Furthermore, a simulation environment was developed in Matlab, which serves as a testing platform for the measurement system.

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Section: Introductionmentioning

confidence: 99%