Results 221 to 230 of about 695,342 (262)

Lower critical solution temperature study on cellulose diacetate-acetone solutions

European Polymer Journal, 1982
Abstract Cloud points of acetone solutions of four well-fractionated samples of cellulose diacetate (degree of substitution = 2.46) have been measured at elevated temperatures. The molecular weight of the fractions ranged from 3.76 × 104 to 17.5 × 104.
H. Suzuki, K. Kamide, M. Saitoh
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Thermodynamic Behavior of Polyelectrolytes with the Lower Critical Solution Temperature (LCST) Phenomenon

Polymers for Advanced Technologies, 1996
A series of vinyl polymers with L-valine and L-leucine residues, and related copolymers with N-isopropylacrylamide, were studied in aqueous solution at different temperatures (25, 30 and 35°C) and at two ionic strengths (0.01 M and 0.1 M NaCl). The protonation behavior revealed great differences between the polymers that were attributed to the size of ...
Casolaro, Mario, Barbucci, R.
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Lower Critical Solution Temperature in the Metastable Region of an Ionic Solution in a Non-Polar Solvent

The Journal of Physical Chemistry B, 2009
Previous studies of the critical behavior of ionic solutions in nonpolar solvents showed mainly upper critical solution temperatures. Now, we report for the solution of tetra-n-butyl ammonium bromide (N4444Br) in toluene a nearly closed miscibility loop, where the lower critical solution temperature (Tc=297.75+/-0.05 K, xc=0.0270+/-5x10(-4)) is located
Harro R, Dittmar, Wolffram H, Schröer
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Polystyrene in cyclopentane: Dilute solution properties from the upper critical to the lower critical solution temperature

Journal of Polymer Science Part B: Polymer Physics, 1987
AbstractDilute solutions of polystyrene in cyclopentane are studied with four narrow‐distribution polymer fractions ranging in molecular weight from 1.6 × 105 to 1.8 × 106. Light scattering (total intensity) and viscosity measurements cover a temperature range spanning both “theta” temperatures: the limiting upper critical solution temperature (19.6°C)
Guy C. Berry, Edward F. Casassa, Pi‐Yao Liu   +2 more
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Hydrophobically modified polyglycidol - the control of lower critical solution temperature

Polymer Bulletin, 2003
Polymers of glycidol (2,3-epoxypropanol-1) of different molar masses (between 2˙104 and 2˙105) and chain topology (linear and comb-like) were synthesised and used to obtain a series of temperature responsive water-soluble poly(glycidol-co-glycidol acetate)s.
Alicja Utrata, Wojciech Walach, Andrzej Dworak, Barbara Trzebicka   +3 more
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The molecular weight dependence of lower and upper critical solution temperatures

Journal of Polymer Science Part C: Polymer Symposia, 1970
AbstractThe 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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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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Saccharide Effect on the Lower Critical Solution Temperature of Thermosensitive Polymers

Macromolecules, 1995
Effects of low molecular weight saccharides in the presence and absence of salts on the lower critical solution temperature (LCST) of typical thermosensitive polymers such as Pluronics, poly-(N-isopropylacrylamide), and N-isopropylacrylamide copolymers with ionizable groups were examined.
Yong-Hee Kim, Ick Chan Kwon, You Han Bae, Sung Wan Kim   +3 more
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Lower critical solution temperatures of poly(decyl methacrylate) in hydrocarbons

European Polymer Journal, 1983
Abstract The high temperature demixing of solutions of poly(decyl methacrylate) (PDMA) was measured as a function of pressure for the following solvents: n-pentane, cyclo-pentane, n-hexane, n-heptane, iso-octane and toluene. In all cases the application of pressure increases the miscibility in the order of 0.4–1.0 K/bar.
E. Maderek, G.V. Schulz, B.A. Wolf
openaire   +1 more source

Lower critical solution temperatures of polypropylene solutions

Journal of Polymer Science: Polymer Physics Edition, 1974
J. M. G. Cowie, I. J. McEwen
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