Vapor Pressures of Aqueous Potassium Chloride Solutions at 25° by Means of a New Type of Differential Manometer

1954 ◽  
Vol 58 (3) ◽  
pp. 255-258 ◽  
Author(s):  
Oliver L. I. Brown ◽  
C. MacGregor Delaney
Keyword(s):  
Potassium Chloride ◽  
Differential Manometer ◽  
Vapor Pressures ◽  
Chloride Solutions ◽  
New Type

scholarly journals ACRYLAMIDE (CO)POLYMERS DISSOLUTION IN WATER-SALINE SOLUTIONS

2018 ◽  
Vol 54 (3) ◽  
pp. 329-337 ◽  
Author(s):  
D. N. Davlyud ◽  
P. D. Vorobiev ◽  
Yu. V. Matrunchik ◽  
E. V. Vorobieva ◽  
N. P. Krutko
Keyword(s):  
Sodium Chloride ◽  
Potassium Chloride ◽  
Solvent System ◽  
Ionogenic Group ◽  
Dissolution Time ◽  
Chloride Solutions ◽  
Sodium Chloride Solutions ◽  
The Difference ◽  
Capillary Viscosimetry ◽  
Saline Solutions

Dissolution of acrylamide anionic (co)polymers in saline solutions (potassium and sodium chlorides) with concentration of 3.4 mol/l was studied by atomic absorption spectroscopy, optical microscopy, gel-test and capillary viscosimetry. It has been established that with increasing in the content of ionogenic groups and the transition from sodium chloride to potassium chloride solutions the dissolution rate of (co)polymer increases. The concentration of cations of low molecular weight electrolytes is higher in the swollen polymer phase than in the solution in the swelling stage of polymers, the difference in the counter ion content decreases with increasing dissolution time. Comparative analysis of the Huggins constant and the hydrodynamic radii of acrylamide (co)polymers has showed that increase in the interaction in polymer-solvent system is accompanied by the increase in size of macromolecular coils. The Kuhn segment of polymer macromolecules is higher in sodium chloride solutions than in potassium chloride solutions and increases with the decrease in ionogenic group content.

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