Effect of molecular association on rheological properties of chitosan/acetic acid aqueous solutions (abstract)

1992 ◽  
Vol 36 (5) ◽  
pp. 980-980
Author(s):  
Takayoshi Matsumoto ◽  
Masahiro Kawai ◽  
Toshiro Masuda
Keyword(s):  
Acetic Acid ◽  
Aqueous Solutions ◽  
Rheological Properties ◽  
Molecular Association

Valorization of a natural residue (sawdust) as adsorbent to remove the acetic acid in aqueous solutions

2015 ◽  
Vol 56 (10) ◽  
pp. 2731-2738 ◽  
Author(s):  
Kamel Rida ◽  
Atika Bouanika ◽  
Meriem Boudellal ◽  
Ali Boukhemkhem
Keyword(s):  
Acetic Acid ◽  
Aqueous Solutions

scholarly journals Synthesis of Mn(II)-containing paratungstate B from aqueous solutions acidified by acetic acid

2021 ◽  
pp. 39-48
Keyword(s):  
Thermal Analysis ◽  
Acetic Acid ◽  
Aqueous Solutions ◽  
Equilibrium Constants ◽  
Background Electrolyte ◽  
Equilibrium Processes ◽  
Transformation Processes ◽  
Paratungstate B ◽  
Solution Acidity ◽  
Tungstate Anion

The method of pH-potentiometric titration and mathematical simulation were used to study the equilibrium processes in aqueous solutions of the WO42––CH3COOH–H2O system in the acidity range Z=(CH3COOH)/(Na2WO4)=0.8–1.7 at СW=0.01 mol L–1 and T=2980.1 K, a constant ionic strength being maintained by sodium nitrate as a background electrolyte ((NaNO3)=0.10 mol L–1). We developed the models of polyoxotungstate anions formation and the equilibrium transformation processes, which adequately describe experimental pH vs. Z dependences. It was found that acetic acid using to create the solution acidity that is necessary for the formation of isopoly tungstate anion contributes only to the formation of protonated paratungstate B anions Нх[W12O40(ОН)2](10–х)– (where x=0–4). We calculated the logarithms of the concentration equilibrium constants of the polyanion formation and plotted the distribution diagrams. Double sodium-manganese(II) paratungstate B Na8(H2O)28Mn(H2O)2[H2W12O42]4H2O was synthesized at Z=1.00 to confirm the results of the mathematical modeling. The chemical composition of the prepared salt was established by chemical elemental analysis, thermal analysis, FTIR spectroscopy, and single crystal X-ray analysis. The stepwise process of salt dehydration was studied by means of differential thermal analysis.

Rheological Properties of Associative Star Polymers in Aqueous Solutions: Effect of Hydrophobe Length and Polymer Topology

2009 ◽  
Vol 42 (5) ◽  
pp. 1726-1732 ◽  
Author(s):  
Sami Hietala ◽  
Satu Strandman ◽  
Paula Järvi ◽  
Mika Torkkeli ◽  
Katja Jankova ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Rheological Properties ◽  
Star Polymers ◽  
Polymer Topology

Macro- and Microscale Rheological Properties of Poly(vinyl alcohol) Aqueous Solutions

2011 ◽  
Vol 115 (12) ◽  
pp. 2759-2764 ◽  
Author(s):  
Keith M. Krise ◽  
Angela A. Hwang ◽  
David M. Sovic ◽  
Bratoljub H. Milosavljevic
Keyword(s):  
Aqueous Solutions ◽  
Rheological Properties ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol
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