| ENTROPIC CONTRIBUTION TO THE INTERACTION PARAMETER xIN THE POLYMER／OLIGOMER SYSTEM： A LATTICE CLUSTER THEORY CONSIDERATION |
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| 作者姓名： | Dong-shanZhou Xiao-liangWang BoChe LiangLi Jin-luChen GiXue |
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| 作者单位： | TheStateKeyLaboratoryofCo-ordinationChemistry,DepartmentofPolymerScienceandEngineering,CollegeofChemistryandChemicalEngineering,NanjingUniversity,Nanjing210093,China |
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| 摘 要： | Entropic contribution to the interaction parameter xeff 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 xeff φ1φ2 perceptibly counteracts the mean field combinary entropy ΔSMF. With the increase of the solvent size, both xeff and the ratio xefc φ1φ2/ΔSMF 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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| 关 键 词： | 团簇理论 熵 低聚物 交互参数 聚合链 |
| 收稿时间： | 2005-10-30 |
| 修稿时间： | 2004-10-30 |
ENTROPIC CONTRIBUTION TO THE INTERACTION PARAMETER c IN THE POLYMER/OLIGOMER SYSTEM: A LATTICE CLUSTER THEORY CONSIDERATION |
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| Dong-shanZhou Xiao-liangWang BoChe LiangLi Jin-luChen GiXue.ENTROPIC CONTRIBUTION TO THE INTERACTION PARAMETER c IN THE POLYMER/OLIGOMER SYSTEM: A LATTICE CLUSTER THEORY CONSIDERATION[J].Chinese Journal of Polymer Science,2005,0(2):159-163. |
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| Authors: | Dong-shan Zhou Xiao-liang Wang Bo Che Liang Li Jin-lu Chen Gi Xue |
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| Institution: | The State Key Laboratory of Co-ordination Chemistry, Department of Polymer Science and Engineering, |
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| Abstract: | Entropic contribution to the interaction parameter xeff 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 xeff φ1φ2 perceptibly counteracts the mean field combinary entropy △SMF. With the increase of the solvent size, both xeff and the ratio xeff φ1φ2/ASMF 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 |
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| Keywords: | POLYMER INTERACTION PARAMETER CONTRIBUTION SYSTEM OLIGOMER CONSIDERATION THEORY CLUSTER work However elusive driven idea demixing current calculation reach maximum zero ratio |
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