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

Published

July 25, 2013

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

Pub Type

Journals

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DOI Link

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 October 12, 2024)