Combining Oscillatory Shear Rheometry and Dynamic Mechanical Analysis to Obtain Wide-Frequency Master Curves

Virág, Ábris Dávid and Juhász, Zsolt and Kossa, Attila and Molnár, Kolos (2024) Combining Oscillatory Shear Rheometry and Dynamic Mechanical Analysis to Obtain Wide-Frequency Master Curves. POLYMER :THE INTERNATIONAL JOURNAL FOR THE SCIENCE AND TECHNOLOGY OF POLYMERS, 295. No.-126742. ISSN 0032-3861 (print); 1873-2291 (online)

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Abstract

In this paper, we present a novel approach combining widely available techniques, oscillatory shear rheometry and dynamic mechanical analysis to obtain wide-frequency range master curves. We carried out finite element analysis to investigate the influence of the specimen thickness and Poisson’s ratio on the moduli measured with a shear sandwich clamp in solid-state. We demonstrated that the thickness/height ratio of the specimen greatly influences its shear stress state. Using polystyrene, which is a thermorheologically simple thermoplastic, we showed that continuous master curves can be generated from melt-state torsion and solid-state shear tests. Our results can facilitate the characterisation of polymers from viscous to elastic state and the development of test methods that use more accurate calculations.

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