Phase behavior of polylactides in solvent-nonsolvent mixtures


Witte, P. van de and Dijkstra, P.J. and Berg, J.W.A. van den and Feijen, J. (1996) Phase behavior of polylactides in solvent-nonsolvent mixtures. Journal of Polymer Science, Part B: Polymer physics, 34 (15). pp. 2553-2568. ISSN 0887-6266

open access
Abstract:Isothermal phase diagrams for the semicrystalline poly-L-lactide (PLLA) and the amorphous poly-DL-lactide (PDLLA) in combination with several solvent-nonsolvent combinations (dioxane/water, dioxane/methanol, chloroform/methanol, and NMP/water) have been determined. The locations of the liquid-liquid miscibility gap, the solid-liquid miscibility gap and the vitrification boundary in the isothermal phase diagrams at 25°C were identified. The liquid-liquid miscibility gap for the systems with PLLA was located in the same composition range as the corresponding systems with PDLLA. For the systems containing PLLA solid-liquid demixing was thermodynamically preferred over liquid-liquid demixing. Attempts were made to correlate the experimental findings with predictions on the basis of the Flory-Huggins theory for ternary solutions using interaction parameters derived from independent experiments. Qualitative agreement was found between the theoretical predictions and the experimentally obtained liquid-liquid miscibility gap. No good agreement was found for the solid-liquid miscibility gap.
Item Type:Article
Copyright:© 1996 Wiley InterScience
Science and Technology (TNW)
Research Group:
Link to this item:
Official URL:<2553::AID-POLB3>3.0.CO;2-U
Export this item as:BibTeX
HTML Citation
Reference Manager


Repository Staff Only: item control page

Metis ID: 105385