The cloud point curves for polysulfone (PSf)/solvent/water systems were determined by a titration method. A small amount of water was needed to induce liquid-liquid demixing and the temperature effect was small. From numerical calculations, it was found that the binary interaction parameters for the
Liquid multi-phase separation in solvent-polymer systems
✍ Scribed by Chermin, H. A. G.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1977
- Tongue
- English
- Weight
- 401 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0007-1641
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✦ Synopsis
Abstract
In Simple Flory‐Huggins solvent‐polymer systems liquid three‐phase separation occurs via a homogeneous double plait point. The conditions for three‐phase separation in a system consisting of a solvent and two polydisperse polymer homologues are given.
It is shown that in a simple Flory‐Huggins solvent‐polymer system four and more phase separation cannot occur.
General conditions for a multicritical point are given.
📜 SIMILAR VOLUMES
## Abstract Cloud‐point curves in mixtures of short‐chain polymers often have irregular shapes, showing shoulders or two maxima. Limits of the thermodynamic stability as measured by Pulse Induced Critical Scattering also appear to be bimodal in such cases. A possible explanation of this phenomenon
In general liquid-liquid demixing processes are responsible for the porous morphology of membranes obtained by immersion precipitation. For rapidly crystallizing polymers, solid-liquid demixing processes also generate porous morphologies. In this study, the interference of both phase transitions has