A quick an accurate method to determine the characteristic material parameters of PDMS

A quick an accurate method to determine the characteristic material parameters of PDMS

The lab for microactuators has published a new method to determine the Poisson’s ratio and the coefficient of thermal expansion of PDMS by using a thermal expansion and an optical surface profilometer.

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In this paper, A. Müller et al. present a new and accurate method to determine the Poisson’s ratio of PDMS, using thermal expansion and an optical surface profilometer. The Poisson’s ratio for Sylgard 184 was found to be ν = 0.4950 ± 0.0010 and for Sylgard 182 ν= 0.4974 ± 0.0006. Furthermore, we found for both PDMS types the coefficient of thermal expansion to depend approximately linear on the curing temperature. This method can be used for almost any kind of soft polymer, which can be cured from a liquid at elevated temperatures.

Soft Matter, 2019, DOI: 10.1039/C8SM02105H

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