Sorption of solutes by poly(ethylene oxide). I. Infinite-dilution studies

Chang, Ya-Wen; Bonner, D. C.

doi:10.1002/app.1975.070190908

Cited by 33 publications

(5 citation statements)

References 3 publications

(4 reference statements)

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“…PEO has also been the subject of several studies − but the molecular weights of the polymers used were generally higher than with this study. Wide temperature range static measurements of sorption of benzene by PEO were made by Saeki and Bonner .…”

Section: Resultsmentioning

confidence: 74%

Gas−Liquid Chromatographic Study of the Solution Thermodynamics of Hydroxylic Derivatives in Selected Polymeric Liquids

2004

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Applications of gas chromatography have been enhanced through conversion of many chemical compounds to derivatives with suitable reagents. This study measured retention volumes of a number of hydroxylic derivatives in polymeric stationary phases. A number of alkanes and aromatics were included in the study for comparison with the derivatives. The stationary phases include a poly(dimethylsiloxane), a poly(methylphenylsiloxane), a poly[methyl(trifluoropropyl)siloxane], and a methoxy poly(ethylene oxide). The selected derivatives were acetates, trimethylsilyl ethers, trifluroroacetates, and pentafluoropropionates. The hydroxylic compounds included butyl alcohol, cyclohexanol, and m- and p-methylphenols; n-butyl tert-butyl ether was included for comparison with n-butyl trimethylsilyl ether. The effects of derivatizing groups on the interaction parameter were considered as a summation of hydrocarbon core and derivative groups. Linear free energy relationships were identified for n-alkanes, aromatics, and n-butyl derivatives. Some thermodynamic results could be interpreted in terms of molecular structure of molecules and specific solute−solvent interactions. Results here support an approach to selecting derivatives for separations matched to column liquid phases.

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Section: Resultsmentioning

confidence: 74%

Gas−Liquid Chromatographic Study of the Solution Thermodynamics of Hydroxylic Derivatives in Selected Polymeric Liquids

2004

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“…Block copolymers containing PEO are also of significant interest, for example as emulsifiers [30][31][32] . Despite the extensive work on PEO polymers in solutions and emulsions, the other limit, water sorption in neat PEO polymers, has received little attention, with only a few reports of water sorption in homopolymer PEO 33 or low-Mw PEO-containing block copolymers 4,[34][35][36] . In all these studies, the PEO was amorphous.…”

Section: Introductionmentioning

confidence: 99%

Crystallite dissolution in PEO-based polymers induced by water sorption

Oparaji

Zuo

Hallinan

2016

Polymer

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Poly(styrene-block-ethylene oxide) (PS-b-PEO) is a model hierarchically nanostructured polymer that contains PEO crystallites within microphase segregated block copolymer morphology. In order to investigate dynamics in this hierarchically nanostructured polymer, water was used as a selective, interacting probe molecule. First, the equilibrium effect of water sorption on the polymer structure was examined. Then, the coupled dynamics of structural changes and water diffusion were studied. At moderate water activity, crystallite dissolution caused water diffusion to appear non-Fickian (determined by Fourier Transform infraredattenuated total reflectance spectroscopy). PEO deliquescence was so extreme at high water activity that dynamics could not be measured in a homopolymer control. In the block copolymer at unity water activity, a second stage of water sorption occurred that was attributed to relaxation of the glassy PS phase. Water desorption was ten times faster than sorption. Desorption is thought to be less hindered by tortuosity resulting from PEO crystallites. These results are of interest for a wide-range of applications including batteries and fuel cells, water desalination, food packaging, and biomedical implants.

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“…Using these values, eqs. (7) and (5) should allow reasonable extrapolation of n-hexane equilibrium with polybutadiene to moderate finite concentrations. For this system, it is probably best to use the value specific for each temperature since the temperature dependence is greater than for either benzene or cyclohexane.…”

Section: P3mentioning

confidence: 99%

Vapor–liquid equilibria for benzene/polybutadiene and cyclohexane/polybutadiene systems at 333, 355, and 373 K using gas chromatography

Lau

Glover

Holste

1982

J of Applied Polymer Sci

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SynopsisA perturbation chromatography apparatus has been designed and constructed for determining the vapor-liquid equilibrium between a two-component (solvent/helium) vapor phase and a twocomponent (polymer/solvent) liquid phase. The apparatus performed very well, giving reproducible and reliable results that agree with independent, previously reported studies. All tests of the equipment indicated that it was successful in meeting the conditions of low column pressure drop, small perturbations, and slow flow rate that are required for perturbation chromatography. Binary polymedsolvent data were obtained for polybutadiene (PBD)/benzene or polybutadiene/cyclohexane systems at solvent partial pressures to 40 kPa and for n-hexane a t infinite dilution, all a t the three temperatures of 333.15,355.00, and 373.15 K. The experimental data for each system can be represented within experimental error by the Flory-Huggins polymer solution theory using a single binary interaction parameter that is independent of temperature and concentration.

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Sorption of solutes by poly(ethylene oxide). I. Infinite-dilution studies

Cited by 33 publications

References 3 publications

Gas−Liquid Chromatographic Study of the Solution Thermodynamics of Hydroxylic Derivatives in Selected Polymeric Liquids

Gas−Liquid Chromatographic Study of the Solution Thermodynamics of Hydroxylic Derivatives in Selected Polymeric Liquids

Crystallite dissolution in PEO-based polymers induced by water sorption

Vapor–liquid equilibria for benzene/polybutadiene and cyclohexane/polybutadiene systems at 333, 355, and 373 K using gas chromatography

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