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- Title
ENTROPIC CONTRIBUTION TO THE INTERACTION PARAMETER χ IN THE POLYMER/OLIGOMER SYSTEM:: A LATTICE CLUSTER THEORY CONSIDERATION.
- Authors
Zhou, Dong-shan; Wang, Xiao-liang; Che, Bo; Li, Liang; Chen, Jin-lu; Xue, Gi
- Abstract
Entropic contribution to the interaction parameter χeff in the model incompressible polymer/oligomer system is calculated by the lattice cluster theory (LCT). It is found that in the oligomer solvent, there exists a wide concentration range that the non-combinatorial "entropic interaction" term χeffϕ1ϕ2 perceptibly counteracts the mean field combinary entropy ぉSMF. With the increase of the solvent size, both χeffand the ratio χeffϕ1ϕ2/ぉSMF first reach their maximum and finally become trivially to zero. It is worth noting that no any demixing was found in the current calculation. This makes the controversial idea "entropically driven demixing" even elusive. However, we propose that further work on compressible polymer solution with structured monomer will witness the demixing owning to an increased configurational correlation.
- Subjects
POLYMERS; CRYSTAL lattices; OLIGOMERS; MONOMERS; MACROMOLECULES
- Publication
Chinese Journal of Polymer Science (World Scientific Publishing Company), 2005, Vol 23, Issue 2, p159
- ISSN
0256-7679
- Publication type
Article
- DOI
10.1142/S0256767905000230