Acid-base equilibria of sulfonephthalein dyes in aqueous polymer-surfactant media

2006 ◽  
Vol 9 (1) ◽  
pp. 39-45 ◽  
Author(s):  
Palash M. Saikia ◽  
Robin K. Dutta
Keyword(s):  
Acid Base ◽  
Aqueous Polymer ◽  
Polymer Surfactant

Heat capacities and volumes in aqueous polymer and polymer–surfactant solutions

1987 ◽  
Vol 65 (5) ◽  
pp. 990-995 ◽  
Author(s):  
Gérald Perron ◽  
Josée Francoeur ◽  
Jacques E. Desnoyers ◽  
Jan C. T. Kwak
Keyword(s):  
Thermodynamic Properties ◽  
Chain Length ◽  
Polymer Concentration ◽  
Heat Capacities ◽  
Aqueous Mixtures ◽  
Alkyltrimethylammonium Bromides ◽  
Aqueous Polymer ◽  
Surfactant Interactions ◽  
Polymer Surfactant ◽  
Polymer Interaction

The apparent molar volumes and heat capacities of aqueous mixtures of neutral polymers and ionic surfactants were measured at 25 °C. The polymers chosen were poly(vinylpyrrolidone) (PVP) and poly(ethyleneoxide) (PEO) and the surfactants were the C8, C10, and C12 homologs of sodium alkylsulfates and the C10, C12, and C16 homologs of alkyltrimethylammonium bromides. The polymer–surfactant interactions depend on the nature of both components and on the chain length of the surfactant. The thermodynamic properties of the cationic surfactants are essentially the same in the absence and presence of polymer indicating little surfactant–polymer interaction. On the other hand, the thermodynamic properties of anionic surfactants are shifted, upon the addition of polymers, in the direction of enhanced hydrophobic association. The effect increases with the surfactant chain length and with the polymer concentration. The effect is larger with PVP than with PEO.

Solvation Dynamics in Aqueous Polymer Solution and in Polymer−Surfactant Aggregate

2002 ◽  
Vol 106 (15) ◽  
pp. 3763-3769 ◽  
Author(s):  
Sobhan Sen ◽  
Dipankar Sukul ◽  
Partha Dutta ◽  
Kankan Bhattacharyya
Keyword(s):  
Polymer Solution ◽  
Solvation Dynamics ◽  
Aqueous Polymer ◽  
Aqueous Polymer Solution ◽  
Polymer Surfactant

Phase diagrams as a formulation guide in aqueous polymer/surfactant systems

1985 ◽  
Vol 25 (17) ◽  
pp. 1110-1117 ◽  
Author(s):  
R. Y. Lochhead ◽  
D. S. Warfield ◽  
C. Gasiewski
Keyword(s):  
Phase Diagrams ◽  
Aqueous Polymer ◽  
Surfactant Systems ◽  
Polymer Surfactant

Freeze-etch TEM of aqueous polymer gel network morphology

1986 ◽  
Vol 44 ◽  
pp. 796-797
Author(s):  
J. A. N. Zasadzinski ◽  
R. K. Prud'homme
Keyword(s):  
Metal Ion ◽  
Polymer Network ◽  
Polymer Gels ◽  
Polymer Gel ◽  
Deformation History ◽  
Crosslinked Polymer ◽  
Aqueous Polymer ◽  
History Of ◽  
Gel Network ◽  
Network Morphology

The rheological and mechanical properties of crosslinked polymer gels arise from the structure of the gel network. In turn, the structure of the gel network results from: thermodynamically determined interactions between the polymer chain segments, the interactions of the crosslinking metal ion with the polymer, and the deformation history of the network. Interpretations of mechanical and rheological measurements on polymer gels invariably begin with a conceptual model of,the microstructure of the gel network derived from polymer kinetic theory. In the present work, we use freeze-etch replication TEM to image the polymer network morphology of titanium crosslinked hydroxypropyl guars in an attempt to directly relate macroscopic phenomena with network structure.

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