ENTROPIC CONTRIBUTION TO THE INTERACTION PARAMETER c IN THE POLYMER/OLIGOMER SYSTEM: A LATTICE CLUSTER THEORY CONSIDERATION
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ENTROPIC CONTRIBUTION TO THE INTERACTION PARAMETER c IN THE POLYMER/OLIGOMER SYSTEM: A LATTICE CLUSTER THEORY CONSIDERATION
Vol. 23, Issue 2, Pages: 159-163(2005)
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Published:20 March 2005
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Dong-shan Zhou, Xiao-liang Wang, Bo Che, et al. ENTROPIC CONTRIBUTION TO THE INTERACTION PARAMETER c IN THE POLYMER/OLIGOMER SYSTEM: A LATTICE CLUSTER THEORY CONSIDERATION[J]. 2005, 23(2): 159-163.
DOI:
Dong-shan Zhou, Xiao-liang Wang, Bo Che, et al. ENTROPIC CONTRIBUTION TO THE INTERACTION PARAMETER c IN THE POLYMER/OLIGOMER SYSTEM: A LATTICE CLUSTER THEORY CONSIDERATION[J]. 2005, 23(2): 159-163.DOI:
ENTROPIC CONTRIBUTION TO THE INTERACTION PARAMETER c IN THE POLYMER/OLIGOMER SYSTEM: A LATTICE CLUSTER THEORY CONSIDERATION
Entropic contribution to the interaction parameter ceff 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 ceff f1f2 perceptibly counteracts the mean field combinary entropy DSMF. With the increase of the solvent size
both ceff and the ratio ceff f1f2 / DSMF 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.
Abstract
Entropic contribution to the interaction parameter ceff 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 ceff f1f2 perceptibly counteracts the mean field combinary entropy DSMF. With the increase of the solvent size
both ceff and the ratio ceff f1f2 / DSMF 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.
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