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Effect of Supercritical Carbon Dioxide on the Thermodynamics of Model Styrene-Acrylonitrile Copolymer-Poly(methyl methacrylate) Blends Studied by Small-Angle Neutron Scattering

Published

Author(s)

Sebnem Inceoglu, Nicholas P. Young, Andrew J. Jackson, Steven Kline, Stephane Costeux, Nitash P. Balsara

Abstract

Small-angle neutron scattering was used to study a binary blend of styrene-acrylonitrile copolymer (SAN) and deuterated poly(methyl methacrylate) (dPMMA), as wellas a multicomponent mixture of SAN, dPMMA, and supercritical carbon dioxide (scSO2). The temperature-dependent interaction parameter (χ) for SAN and dPMMA was determined from the mixture in the absence of scCO2, and then used in combination with solubility measurements of scCO2 with each polymer to describe the thermodynamic interactions of the ternary system. The binary interaction parameters between the scCO2 and the polymers were obtained by equating chemical potential in the single-phase mixtures, and were shown to increase monotonically with pressure across the range studied. scCO^d26 was shown to significantly decrease the temperature at which phase separation occurred.
Citation
Macromolecules
Volume
46

Keywords

polymer blends, supercritical carbon dioxide, small-angle neutron scattering, random phase approximation, thermodynamic interactions, Styrene-acrylonitrile copolymer, poly(methyl methacrylate)

Citation

Inceoglu, S. , Young, N. , Jackson, A. , Kline, S. , Costeux, S. and Balsara, N. (2013), Effect of Supercritical Carbon Dioxide on the Thermodynamics of Model Styrene-Acrylonitrile Copolymer-Poly(methyl methacrylate) Blends Studied by Small-Angle Neutron Scattering, Macromolecules, [online], https://doi.org/10.1021/ma401090q (Accessed April 13, 2024)
Created July 25, 2013, Updated March 11, 2024