High-pressure binary phase equilibria, density and dynamic viscosity of 100 & 200 cSt polydimethylsiloxane (PDMS) with supercritical CO 2
Abstract(#br)The phase equilibria and saturated fluid properties of CO 2 + PDMS (polydimethylsiloxane) systems were measured to investigate suitability for future hydrodynamic experiments. Two PDMS fluids graded at 100 cSt (M w = 14 300, M z = 22 000, Đ M = 1.59) and 200 cSt (M w = 18 400, M z = 53 000, Đ M = 4.72) were selected. Saturation pressure, and hence phase transition pressure, was determined for 1–70 wt% PDMS in CO 2 at 313–353 K using the variable volume view cell method (SynVisVar).