Metastable liquid-liquid and solid-liquid phase boundaries in polymer-solvent-nonsolvent systems

Share/Save/Bookmark

Witte van de, P. and Dijkstra, P.J. and Berg van den, J.W.A. and Feijen, J. (1997) Metastable liquid-liquid and solid-liquid phase boundaries in polymer-solvent-nonsolvent systems. Journal of Polymer Science, Part B: Polymer physics, 35 (5). pp. 763-770. ISSN 0887-6266

[img]
Preview
PDF
202Kb
Abstract: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 been analyzed theoretically using the Flory-Huggins theory for ternary polymer solutions. It is demonstrated that four main thermodynamic and kinetic parameters are important for the structure formation in solution: the thermodynamic driving force for crystallization, the ratio of the molar volumes of the solvent and the nonsolvent, the polymer-solvent interaction parameter, and the rate of crystallization of the polymer compared to the rate of solvent-nonsolvent exchange. An analysis of the relevance of each of these parameters for the membrane morphology is presented.
Item Type:Article
Copyright:© 1997 Wiley InterScience
Faculty:
Science and Technology (TNW)
Research Group:
Link to this item:http://purl.utwente.nl/publications/71366
Official URL:http://www3.interscience.wiley.com/journal/53362/abstract
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page

Metis ID: 106377