Abstract
The (liquid + liquid) equilibrium of solutions of hyperbranched polyesters is calculated with the latticecluster theory (LCT) combined with a chemical association model. The considered solvents are n-alkanes as well as propan-1-ol and butan-1-ol. The structure of the solvents is also considered in the framework of the LCT, assuming the solvent molecules as linear chains of several segments. For polymer solutions with the non-associating n-alkanes only the self association of the hyperbranched polymer molecules has to be considered by the chemical association lattice model (CALM). For the solutions of the type alcohol + hyperbranched polymer additionally the cross association is taken into account by a modified version of the extended chemical association lattice model (ECALM). The association effects are proved to influence strongly the phase equilibrium. Calculating the cloud-point curve and the critical point the polydispersity of the polymer samples is neglected. There is a reasonable agreement of the calculated curves with the experimental data taken from the literature.
Original language | English |
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Pages (from-to) | 1969-1976 |
Number of pages | 8 |
Journal | The Journal of Chemical Thermodynamics |
Volume | 43 |
Issue number | 12 |
DOIs | |
Publication status | Published - Dec 2011 |
Keywords
- (Liquid + liquid) equilibrium
- Chemical association model
- Hyperbranched polymer solutions
- Lattice-cluster theory
- Method of calculation
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Atomic and Molecular Physics, and Optics
- Materials Science(all)