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Thermodynamics of phase behavior in PEO/P(EO-b-DMS) homopolymer and block co-oligomer mixtures under pressure
Jiang, SC; An, LJ; Jiang, BZ; Wolf, BA
2003-12-08
Source PublicationMACROMOLECULAR CHEMISTRY AND PHYSICS
ISSN1022-1352
Volume204Issue:18Pages:2265-2273
AbstractThe cloud-point temperatures (T-cl's) of poly(ethylene oxide) (PEO) and poly(ethylene oxide)-block-polydimethylsiloxane (P(EO-b-DMS)) homopolymer and block-oligomer mixtures were determined by turbidity measurements over a range of temperatures (105 to 130degrees), pressures (1 to 800 bar), and compositions (10-40 wt.-% PEO). The system phase separates upon cooling and T-cl was found to decrease with an increase in pressure for a constant composition. In the absence of special effects, this finding indicates negative excess volumes. Special attention was paid to the demixing temperatures as a function of the pressure for the different polymer mixtures and the plots in the T-phi plane (where phi signifies volume fractions). The cloud-point curves of the polymer mixture under pressures were observed for different compositions. The Sanchez-Lacombe (SL) lattice fluid theory was used to calculate the spinodals, the binodals, the Flory-Huggins (FH) interaction parameter, the enthalphy of mixing, and the volume changes of mixing. The calculated results show that modified P(EO-b-DMS) scaling parameters with the new combining rules can describe the thermodynamics of the PEO/P(EO-b-DMS) system well with the SL theory.
KeywordPhase Behavior Poly(Ethylene Oxide)/Poly(Ethylene Oxide)-block-Polydimethylsiloxane Mixture Pressure Effects Sanchez-lacombe Lattice Fluid Theory Thermodynamics
DOI10.1002/macp.200350077
Indexed BySCI
Language英语
WOS IDWOS:000187619000011
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/81350
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 Chem Phys, D-55099 Mainz, Germany
Recommended Citation
GB/T 7714
Jiang, SC,An, LJ,Jiang, BZ,et al. Thermodynamics of phase behavior in PEO/P(EO-b-DMS) homopolymer and block co-oligomer mixtures under pressure[J]. MACROMOLECULAR CHEMISTRY AND PHYSICS,2003,204(18):2265-2273.
APA Jiang, SC,An, LJ,Jiang, BZ,&Wolf, BA.(2003).Thermodynamics of phase behavior in PEO/P(EO-b-DMS) homopolymer and block co-oligomer mixtures under pressure.MACROMOLECULAR CHEMISTRY AND PHYSICS,204(18),2265-2273.
MLA Jiang, SC,et al."Thermodynamics of phase behavior in PEO/P(EO-b-DMS) homopolymer and block co-oligomer mixtures under pressure".MACROMOLECULAR CHEMISTRY AND PHYSICS 204.18(2003):2265-2273.
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