Results 251 to 260 of about 911,076 (286)
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The molecular weight dependence of lower and upper critical solution temperatures
Journal of Polymer Science Part C: Polymer Symposia, 1970AbstractThe molecular weight dependence of the Lower Critical Solution Temperature in polymer solutions has been derived using the Prigogine smoothed potential cell model. Satisfactory agreement is obtained with experimental results for a number of systems.
G. Delmas, D. Patterson
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Electric field effect on the upper critical solution temperature
Chemical Physics, 1999Abstract Using a non-linear dielectric effect apparatus the influence of electric fields on the upper critical mixing temperature of nitrobenzene+2,2,4-trimethylpentane was investigated. A downward shift of the critical temperature proportional to the square of the electric field was found. The d T c /d E 2 derivative was estimated as −0.85±0.2×10
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Upper critical solution temperatures of mixtures containing sulphur hexafluoride
Fluid Phase Equilibria, 1982Abstract The upper critical solution temperatures, UCST, of a number of mixtures of simple organic substances, including C 5 to C 10 alkanes, with sulphur hexafluoride are reported. These UCST are analysed in terms of the one fluid model in order to estimate an interaction parameter, ξ, which is a measure of the strength of the interactions between
Janet Semmens +2 more
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Upper and lower critical solution temperatures in 2‐butanone solutions of cellulose diacetate
British Polymer Journal, 1982AbstractIt was found that cellulose diacetate (the degree of substitution = 2.46) dissolved in 2‐butanone but that these solutions presented cloud points in both regions of the lower and upper critical solution temperatures (LCST and UCST). The cloud points were measured for one unfractionated and three well‐fractionated samples, from which the LCST ...
H. Suzuki +3 more
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Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1976
Upper and lower critical solution temperatures have been measured for both atactic and isotactic forms of poly(methylmethacrylate) in a number of solvents. Results have been analysed in terms of the Prigogine–Patterson–Flory theory and the critical solution temperatures, which are experimentally inaccessible, can be predicted from this theory.
John M. G. Cowie, Iain J. McEwen
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Upper and lower critical solution temperatures have been measured for both atactic and isotactic forms of poly(methylmethacrylate) in a number of solvents. Results have been analysed in terms of the Prigogine–Patterson–Flory theory and the critical solution temperatures, which are experimentally inaccessible, can be predicted from this theory.
John M. G. Cowie, Iain J. McEwen
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Journal of the American Chemical Society, 2017
Temperature-induced self-assembly of block copolymers allows the formation of smart nanodimensional structures. Mostly, nondegradable lower critical solution temperature (LCST) segments are applied to prepare such dynamic aggregates. However, degradable upper critical phase separation (UCST) block copolymers that would allow the swelling or disassembly
Thomas Wolf +3 more
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Temperature-induced self-assembly of block copolymers allows the formation of smart nanodimensional structures. Mostly, nondegradable lower critical solution temperature (LCST) segments are applied to prepare such dynamic aggregates. However, degradable upper critical phase separation (UCST) block copolymers that would allow the swelling or disassembly
Thomas Wolf +3 more
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Tunable Upper Critical Solution Temperatures for Acrylamide Copolymers with Bile Acid Pendants
Biomacromolecules, 2017Acrylamide derivatives of bile acids are chosen as a hydrophobic comonomer to copolymerize with acrylamide via reversible addition and fragmentation chain transfer (RAFT) polymerization to afford a series of copolymers of P(AAm-co-CAA). These copolymers exhibit a sharp and reversible insoluble-soluble transition in water upon heating to a mixing ...
Yong-Guang Jia +4 more
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A new model for upper and lower critical solution temperatures in poly(ethylene oxide) solutions
The Journal of Physical Chemistry, 1985Diagramme de phases du systeme PEO-eau calcule en utilisant la theorie de Flory; accord semi-quantitatif avec l ...
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The Journal of Chemical Physics, 1975
A decorated lattice model of a two−component liquid solution is presented which has closed−loop coexistence curves with both upper and lower critical solution temperatures analogous to the behavior found in the nicotine + water and m−toluidine + glycerol systems. The model can be transformed exactly into the spin−1/2 Ising model for which exact results
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A decorated lattice model of a two−component liquid solution is presented which has closed−loop coexistence curves with both upper and lower critical solution temperatures analogous to the behavior found in the nicotine + water and m−toluidine + glycerol systems. The model can be transformed exactly into the spin−1/2 Ising model for which exact results
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Pressure dependence of upper critical solution temperatures in polymer solutions
Macromolecules, 1986S. Saeki +4 more
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