Abstract
A new instrument for measuring accurate P–V–T relations of polymer solutions and liquid crystals and for observing their optical properties under pressure and microscope has been constructed. The P–V–T relations of a poly(dimethylsiloxane)–benzene system were measured in the range of 303.15–323.15 K and at a pressure up to 140 bar. The isothermal compressibilities (KT) and the thermal expansion coefficients (αP) were determined from the P–V–T relations and then the composition dependence of KT and αP was discussed. We determined that KT-composition relations for this system were linear for each temperature within the experimental range and that the plots of αP against concentrations of poly(dimethylsiloxane) in benzene had a curvature with a positive deviation from linearity. The concentration dependence of the internal pressure, (∂U/∂V)T, was also discussed.
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Kim, Y., Ogino, K. The P–V–T Relations of Poly(dimethylsiloxane) Solution in Benzene. Polym J 11, 449–454 (1979). https://doi.org/10.1295/polymj.11.449
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DOI: https://doi.org/10.1295/polymj.11.449