Results 251 to 260 of about 1,776,297 (283)

Upper and lower critical solution temperatures in poly (ethylene glycol) solutions

Polymer, 1976
Upper and lower critical solution temperatures have been determined for solutions of poly(ethylene glycol) in t-butyl acetate and water over the molecular weight range of Mη = 2.18 × 103 to ∼1020 × 103. The phase diagram for solutions of poly(ethylene glycol) (Mη = 719 × 103) in t-butyl acetate was expressed as the ‘hour glass’ type, while the phase ...
Susumu Saeki, Nobuhiro Kuwahara, Mitsuo Nakata, Motozo Kaneko   +3 more
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Polymer fractionation at a lower critical solution temperature phase boundary

Polymer, 1966
Abstract The influence of pressure on a lower critical solution temperature is much more pronounced than on an upper critical solution temperature. Accordingly it is possible to control phase separation at a LCST phase boundary under isothermal conditions by merely adjusting the pressure on the system.
C. H. Baker, C. S. Clemson, G. Allen
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Lower critical solution temperatures of polybutadiene solutions

Journal of Polymer Science Part B: Polymer Letters, 1967
Abstract The lower critical solution temperature (LCST) is observed in polymer solvent systems as a rather high temperature above which the solution separates into two phases. This is a relatively recently discovered phenomenon, since it normally occurs above the boiling point of the solvent.
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Lower critical solution temperature and hydrophobic hydration in aqueous polymer solutions

Colloid & Polymer Science, 1994
Phase diagrams of aqueous solutions of poly(N-vinyl caprolactam) (PVCL), N-vinyl caprolactam copolymer with vinylamine (3.8 mol%) (CP(VCL-VA)), and poly(N-vinyl propylacetamide) (PVPA) were shown to be binodal curves with lower critical solution temperatures (LCST) in the range 304–313.5 K and critical concentrations in the range of 0.02–0.08 polymer ...
A. A. Tager, A. P. Safronov, E. A. Berezyuk, I. Yu. Galaev   +3 more
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An Air Conditioning Cycle Using Lower Critical Solution Temperature Mixtures

ASME 2023 Heat Transfer Summer Conference, 2023
Abstract The refrigerants and electricity consumption of existing air conditioning systems create significant greenhouse gas (GHG) emissions. This work describes a new air conditioning cycle that uses a lower critical solution temperature (LCST) liquid mixture to provide dehumidification and cooling. The cycle uses no refrigerants and is
Jordan D. Kocher, Akanksha K. Menon, Shannon K. Yee   +2 more
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A comparison of lower critical solution temperatures of some polymer solutions

Polymer, 1967
Abstract The Lower Critical Solution Temperature (LCST) in polymer solutions is discussed in terms of the Prigogine solution theory which predicts an LCST below the vapour-liquid critical temperature of the solvent (T c ). The interval between these two temperatures depends on differences in chain length and ‘flexibility’ of the polymer and solvent ...
D. Patterson, G. Delmas, T. Somcynsky
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Cation-Induced Hydration Effects Cause Lower Critical Solution Temperature Behavior in Protein Solutions

The Journal of Physical Chemistry B, 2016
The phase behavior of protein solutions is important for numerous phenomena in biology and soft matter. We report a lower critical solution temperature (LCST) phase behavior of aqueous solutions of a globular protein induced by multivalent metal ions around physiological temperatures.
Olga, Matsarskaia, Michal K, Braun, Felix, Roosen-Runge, Marcell, Wolf, Fajun, Zhang, Roland, Roth, Frank, Schreiber   +6 more
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Determination of Lower Critical Solution Temperature of thermosensitive flocculants

Minerals Engineering, 2014
Abstract Thermosensitive polymers are gaining increasing interest due to their possible applications as drug delivery systems, flotation agents in mineral ore processing or flocculants in wastewater treatment. Lower Critical Solution Temperature (LCST) is a crucial parameter of thermoresponsive polymers.
Marcin Lemanowicz, Andrzej Gierczycki, Wojciech Kuźnik, Rafał Sancewicz, Patrycja Imiela   +4 more
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Polymer chain collapse near the lower critical solution temperature

Chemical Physics Letters, 1997
Abstract We report for the first time by computer simulations, evidence of polymer chain collapse near a lower critical solution temperature (LCST). Continuous space, Monte Carlo simulations have been performed on freely jointed, Lennard-Jones chains in a LJ monomeric solvent with symmetric energetics.
Gabriel Luna-Bárcenas, Dmitry G. Gromov, J.Carson Meredith, Isaac C. Sanchez, Juan J. de Pablo, Keith P. Johnston   +5 more
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Lower critical solution temperatures of polyisobutylene plus isomeric alkanes

Polymer, 1969
Abstract Lower critical solution temperatures (LCST) have been obtained for polyisobutylene and some thirty isomeric pentanes, hexanes, heptanes and octanes. The LCSTs found with cyclic alkanes are about 125 deg. C higher than those with the corresponding normal alkanes.
J.-M Bardin, D Patterson
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