Thermoreversible gelation and vitrification of highly concentrated polymer solutions under poor thermodynamic conditions

1991 ◽  
Vol 24 (19) ◽  
pp. 5387-5392 ◽  
Author(s):  
Thomas Schneider ◽  
B. A. Wolf ◽  
Heinz Kasten ◽  
Friedrich Kremer
Keyword(s):  
Polymer Solutions ◽  
Thermoreversible Gelation ◽  
Thermodynamic Conditions

On the cooccurrence of demixing and thermoreversible gelation of polymer solutions. 1. Experimental observations

1987 ◽  
Vol 20 (8) ◽  
pp. 1943-1947 ◽  
Author(s):  
L. M. Jelich ◽  
S. P. Nunes ◽  
E. Paul ◽  
B. A. Wolf
Keyword(s):  
Polymer Solutions ◽  
Thermoreversible Gelation

Effects of added surfactants on thermoreversible gelation of associating polymer solutions

2004 ◽  
Vol 42 (5) ◽  
pp. 733-751 ◽  
Author(s):  
Tsutomu Furuya ◽  
Tsuyoshi Koga ◽  
Fumihiko Tanaka
Keyword(s):  
Polymer Solutions ◽  
Thermoreversible Gelation ◽  
Associating Polymer

On the cooccurrence of demixing and thermoreversible gelation of polymer solutions. 2. Thermodynamic background

1987 ◽  
Vol 20 (8) ◽  
pp. 1948-1951 ◽  
Author(s):  
S. P. Nunes ◽  
B. A. Wolf ◽  
H. E. Jeberien
Keyword(s):  
Polymer Solutions ◽  
Thermoreversible Gelation ◽  
Thermodynamic Background

scholarly journals Thermoreversible Gelation with Two-Component Mixed Cross-Link Junctions of Variable Multiplicity in Ternary Polymer Solutions

Gels ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 89
Author(s):  
Fumihiko Tanaka
Keyword(s):  
Functional Groups ◽  
Polymer Solutions ◽  
Sol Gel ◽  
Polymer Networks ◽  
Water Soluble ◽  
Cross Link ◽  
Variable Multiplicity ◽  
Multiple Cross ◽  
Thermoreversible Gelation ◽  
Cross Links

Theoretical scheme is developed to study thermoreversible gelation interfering with liquid–liquid phase separation in mixtures of reactive f-functional molecules R{Af} and g-functional ones R{Bg} dissolved in a common solvent. Formed polymer networks are assumed to include multiple cross-link junctions containing arbitrary numbers k1 and k2 of functional groups A and B of each species. Sol-gel transition lines and spinodal lines are drawn on the ternary phase plane for some important models of multiple cross-link junctions with specified microscopic structure. It is shown that, if the cross-link structure satisfies a certain simple condition, there appears a special molar ratio of the two functional groups at which gelation takes place with a lowest concentration of the solute molecules, as has been often observed in the experiments. This optimal gelation concentration depends on f and g (functionality) of the solute molecules and the numbers k1 and k2 (multiplicity) of the functional groups in a cross-link junction. For cross-links which allow variable multiplicity, special attention is paid on the perfectly immiscible cross-links leading to interpenetrating polymer networks, and also on perfectly miscible cross-links leading to reentrant sol-gel-sol transition. Results are compared with recent observations on ion-binding polymer solutions, polymer solutions forming recognizable biomolecular complexes, polymer/surfactant mixtures, hydrogen-bonding polymers, and hydrophobically-modified amphiphilic water-soluble polymers.

Scaling approach to dilferential swelling of polymer solutions and gels

1994 ◽  
Vol 4 (10) ◽  
pp. 1677-1685 ◽  
Author(s):  
P. Pekarski ◽  
Y. Rabin ◽  
M. Gottlieb
Keyword(s):  
Polymer Solutions

Viscoelastic effect on nucleation in semidilute polymer solutions

1992 ◽  
Vol 2 (8) ◽  
pp. 1505-1509 ◽  
Author(s):  
Akira Onuki
Keyword(s):  
Polymer Solutions ◽  
Viscoelastic Effect
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