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Certification of the Rheological Behavior of SRM 2491, Polydimethylsiloxane



Carl R. Schultesiz, Kathleen M. Flynn, Stefan D. Leigh


The certification of the rheological properties of Standard Reference Material (SRM) 2491, a non-Newtonian fluid consisting of polydimethylsiloxane, is described. The viscosity and the first normal stress difference were measured in steady shear at rates between 0.001 s-1 and 6.3 s-1 at 0 C, 25 C and 50 C. The linear viscoelastic storage modulus G' and loss modulus G'' were also measured in dynamic oscillatory measurements between 0.1 rad/s and 100 rad/s in the temperature range between 0 C and 50 C and master curves calculated using time temperature superposition.
Special Publication (NIST SP) - 260-147
Report Number


first normal stress difference, loss modulus, polydimethylsiloxane, standard reference material, storage modulus, time temperatures


Schultesiz, C. , Flynn, K. and Leigh, S. (2003), Certification of the Rheological Behavior of SRM 2491, Polydimethylsiloxane, Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD (Accessed June 22, 2024)


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Created October 31, 2003, Updated October 12, 2021