Vapor-liquid equilibrium in binary and ternary aqueous solutions of poly(ethylene glycol) and dextran

Gaube, Johann; Pfennig, Andreas; Stumpf, Matthias

doi:10.1021/je00009a040

Cited by 49 publications

(46 citation statements)

References 8 publications

(15 reference statements)

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“…In Fig. 3 we compare our derived volume fraction–water activity relationships with water activity data reported for PEG (0.6 kg mol −1 ) (Gaube et al, 1993) and PAA (4 kg mol −1 ) (Safronov et al, 1993), using a variety of standard analytical techniques. The results are generally in very good agreement.…”

Section: Resultsmentioning

confidence: 97%

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Cloud droplet activation of polymerized organic aerosol

Petters

Kreidenweis

Snider

et al. 2006

Tellus B: Chemical and Physical Meteorology

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High‐molecular‐weight organic compounds represent an important fraction in atmospheric aerosols, but their interactions with atmospheric water vapour are not well understood. Specifically, the hygroscopicity of polymerized atmospheric aerosols is larger than expected for their high molecular weights and is not a strong function of the degree of polymerization, but their cloud‐nucleating activity declines as polymerization progresses. We apply a Flory–Huggins based theory for polymer–water interactions to describe water activity in aqueous solutions of atmospherically relevant oligomers and polymers, and show via experiments on particles composed of commercial polymers that it is consistent with observed particle hygroscopic growth and cloud formation behaviour.

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Section: Resultsmentioning

confidence: 97%

“… Water activity measurements of PEG (▵ 0.6 kg mol −1 , T = 313.15 K; ⋄ 0.6 kg mol −1 , T = 293.15 K) by Gaube et al (1993) and PAA (▪ 4.0 kg mol −1 , T = 298 K) by Safronov et al (1993). Water activity, inferred from Figure 1, for PEG, corrected PEG (assuming that the dry diameter was biased low by 2%), and PAA is also shown.…”

Section: Resultsmentioning

confidence: 99%

Cloud droplet activation of polymerized organic aerosol

Petters

Kreidenweis

Snider

et al. 2006

Tellus B: Chemical and Physical Meteorology

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“…Comparing the value of a regressed from Equation (14) to the value determined from light scattering will provide insight as to how different molecular interactions influence the protein partitioning behavior in an aqueous two-phase system. More recently, the phaseequilibrium calculations based on virial coefficients have been directly linked to specific intermolecular interactions of the components (Haynes et al, 1993;Gaube et al, 1993;Coen et al, 1995). Such a step requires a larger number of molecular properties not readily available for different phase systems and proteins.…”

Section: Thermodynamic Frameworkmentioning

confidence: 99%

Contribution of protein charge to partitioning in aqueous two-phase systems

Fan¹,

Bakır²,

Glatz³

1998

Biotechnol. Bioeng.

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“…It should, therefore, be useful to have information about vapor-liquid equilibria of the PPO and PEO with water in order to understand better and possibly predict the solution behavior of these polymers. There have been a number of studies on vapor-liquid equilibria of PEO in water [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27], while the corresponding information on PPO in water is more scarce and existing data were limitedly reported only for a very samll concentration range. Malcolm and Rowlinson [11] reported measurements of the vapor pressures of aqueous solutions of PPO 400 in the polymer mass fraction range 0.6-0.99 at 303.15 and 323.15 K. They only reported six experimantal data at each temperature.…”

Section: Introductionmentioning

confidence: 99%