An experimental investigation of cloud-point curves for the poly(ethylene glycol)/water system at varying molecular weight distributions

Saraiva, Ana; Persson, Ole; Fredenslund, Aage

doi:10.1016/0378-3812(93)85105-u

Cited by 41 publications

(33 citation statements)

References 18 publications

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“…The molten standard was then introduced into a preheated sample tube which was already sealed by flame at one end. The other end of the tube was sealed with a Swagelok cap, a sealing method introduced by Saraiva et al (1993).…”

mentioning

confidence: 99%

On the temperature calibration of a thermo-optical apparatus

Pfohl¹,

Hino²,

Prausnitz³

1995

Fluid Phase Equilibria

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mentioning

confidence: 99%

On the temperature calibration of a thermo-optical apparatus

Pfohl¹,

Hino²,

Prausnitz³

1995

Fluid Phase Equilibria

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“…On the other hand, the model was used to predict the CP temperature of (H 2 O + PEG) system, and the results are presented in figure 3. These results are compared with values reported by Bae et al [27] and Saraiva et al [41], who determined the CP curves for aqueous solutions of PEG with molecular weight of 3350 and 3970, respectively. As one can see from figure 3, the values predicted by the model are close to the data above mentioned.…”

Section: Correlation Of Cloud-point Temperaturementioning

confidence: 56%

Cloud-point measurements of the {H2O+poly(ethylene glycol)+NaNO3} system

Jiménez¹,

Taboada²,

Galleguillos³

2011

The Journal of Chemical Thermodynamics

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“…The origin of these clusters is still a point of contention [18]. The properties of PEO are very well known including data on its viscosity [19], solubility [20], phase behaviour [21] and crystallisation [22]. In water, PEO molecules adopt an expanded coil structure as water is considered a good solvent for PEO.…”

Section: Introductionmentioning

confidence: 99%

Controlling and characterising the deposits from polymer droplets containing microparticles and salt

et al. 2016

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Abstract.A coffee ring-stain is left behind when droplets containing a wide range of different suspended particles evaporate, caused by a pinned contact line generating a strong outwards capillary flow. Conversely, in the very peculiar case of evaporating droplets of poly(ethylene oxide) solutions, tall pillars are deposited in the centre of the droplet following a boot-strapping process in which the contact line recedes quickly, driven by a constricting collar of polymer crystallisation: no other polymer has been reported to produce these central pillars. Here we map out the phase behaviour seen when the specific pillar-forming polymer is combined with spherical microparticles, illustrating a range of final deposit shapes, including the standard particle ring-stain, polymer pillars and also flat deposits. The topologies of the deposits are measured using profile images and stylus profilometery, and characterised using the skewness of the profile as a simple analytic method for quantifying the shapes: pillars produce positive skew, flat deposits have zero skew and ring-stains have a negative value. We also demonstrate that pillar formation is even more effectively disrupted using potassium sulphate salt solutions, which change the water from a good solvent to a thetapoint solvent, consequently reducing the size and configuration of the polymer coils. This inhibits polymer crystallisation, interfering with the bootstrap process and ultimately prevents pillars from forming. Again, the deposit shapes are quantified using the skew parameter.

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An experimental investigation of cloud-point curves for the poly(ethylene glycol)/water system at varying molecular weight distributions

Cited by 41 publications

References 18 publications

On the temperature calibration of a thermo-optical apparatus

On the temperature calibration of a thermo-optical apparatus

Cloud-point measurements of the {H2O+poly(ethylene glycol)+NaNO3} system

Controlling and characterising the deposits from polymer droplets containing microparticles and salt

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