Piezoelectric shear rheometry: Further developments in experimental implementation and data extraction

نویسندگان

چکیده

The piezoelectric shear gauge (PSG) [Christensen and Olsen, Rev. Sci. Instrum. 66, 5019 (1995)] is a rheometric technique developed to measure the complex modulus of viscous liquids near their glass transition temperature. We report recent advances PSG technique: (1) data extraction procedure optimized, which extends upper limit frequency range method between 50 70 kHz. (2) measuring cell simplified use only one ceramic disk instead three. present an implementation this design intended for liquid samples. Data obtained with revealed that soft extra spacer necessary allow thermal contraction sample in axial direction. Model calculations show flow radial direction hindered by confined geometry when becomes upon cooling. especially well-suited for—but not limited to—glassy materials.

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ژورنال

عنوان ژورنال: Journal of Rheology

سال: 2022

ISSN: ['1520-8516', '0148-6055']

DOI: https://doi.org/10.1122/8.0000379