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Temperature and pressure dependence of phase separation of trans-decahydronaphthalene/polystyrene solution
Jiang, SC; An, LJ; Jiang, BZ; Wolf, BA
2004-03-08
Source PublicationCHEMICAL PHYSICS
ISSN0301-0104
Volume298Issue:1-3Pages:37-45
AbstractThe cloud-point temperatures (T-c1's) of ti-ans-decahydronaphthalene (TD)/polystyrene (PS, M-w = 270 kg/mol) solutions were determined by fight scattering measurements over a range of temperatures (1-16 degreesC), pressures (100-900 bar), and compositions (4.2-21.6 vol% polymer). The system phase separates upon cooling and the T-c1 was found to increase with the rising pressure for the constant composition. In the absence of special effects this finding indicates positive excess volumes. The special attention was paid to the demixing temperatures as a function of the pressure for the different polymer solutions and the plots in the T-volume fraction plane and P-volume fraction plane. The cloud-point curves of polymer solutions under changing pressures were observed for different compositions, demonstrates that the TD/PS system exhibits UCST (phase separation upon cooling) behavior. With this data the phase diagrams under pressure were calculated applying the Sanchez-Lacombe (SL) lattice fluid theory. Furthermore, the cause of phase separation, i.e., the influence of Flory-Huggins (FH) interaction parameter under pressure was investigated. The predictions of the SL theory concerning the FH interaction parameter and the influence of pressure on miscibility are investigated. The LCSP (phase separation upon increasing pressure) and UCST behavior were predicated by extrapolating the pressure to negative region on pressure-composition plane for TD/PS polymer solutions. (C) 2003 Elsevier B.V. All rights reserved.
KeywordTd/ps Polymer Solution Thermodynamics Pressure Effect Negative Pressure
DOI10.1016/j.chemphys.2003.11.002
Indexed BySCI
Language英语
WOS IDWOS:000189216600004
PublisherELSEVIER SCIENCE BV
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/82048
Collection中国科学院化学研究所
Corresponding AuthorJiang, SC
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.Univ Mainz, Inst Phys Chem, D-55099 Mainz, Germany
Recommended Citation
GB/T 7714
Jiang, SC,An, LJ,Jiang, BZ,et al. Temperature and pressure dependence of phase separation of trans-decahydronaphthalene/polystyrene solution[J]. CHEMICAL PHYSICS,2004,298(1-3):37-45.
APA Jiang, SC,An, LJ,Jiang, BZ,&Wolf, BA.(2004).Temperature and pressure dependence of phase separation of trans-decahydronaphthalene/polystyrene solution.CHEMICAL PHYSICS,298(1-3),37-45.
MLA Jiang, SC,et al."Temperature and pressure dependence of phase separation of trans-decahydronaphthalene/polystyrene solution".CHEMICAL PHYSICS 298.1-3(2004):37-45.
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