Experimental setup for measuring the barocaloric effect in polymers: Application to natural rubber

Abstract

Barocaloric materials have shown to be promising alternatives to the conventional vapor-compression refrigeration technologies. Nevertheless, barocaloric effect (σb-CE) has not been extensively examined for many classes of materials up to now. Aiming at fulfilling this gap, this paper describes the development of a high-pressure experimental setup for measuring the σb-CE in polymers. The design allows simultaneous measurements of temperature, pressure and strain during the barocaloric cycle. The system proved to be fully-functional through basic experiments using natural rubber. Samples exhibited large temperature variations associated to the σb-CE. Strain-temperature curves were also obtained, which could allow indirect measurements of the isothermal entropy change.

arXiv comment8 pages, 4 figures. Correction in Figure 4

References in corpus (1)

• Elastocaloric effect associated with the martensitic transition in shape-memory alloys

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