The Effect of Temperature and Solvent Type on the Intrinsic Viscosity of High Polymer Solutions

1942 ◽  
Vol 64 (7) ◽  
pp. 1557-1560 ◽  
Author(s):  
T. Alfrey ◽  
A. Bartovics ◽  
H. Mark
Keyword(s):  
Intrinsic Viscosity ◽  
Polymer Solutions ◽  
Effect Of Temperature ◽  
High Polymer ◽  
Solvent Type

The Effect of Temperature and Solvent Type on the Intrinsic Viscosity of High-Polymer Solutions

1942 ◽  
Vol 15 (4) ◽  
pp. 820-825
Author(s):  
T. Alfrey ◽  
A. Bartovics ◽  
H. Mark
Keyword(s):  
Molecular Shape ◽  
Effect Of Temperature ◽  
Quadratic Term ◽  
High Polymer ◽  
Dilute Solution ◽  
Specific Viscosity ◽  
Solvent Type ◽  
Polystyrene Solution ◽  
Pure Methanol ◽  
Poor Solvent

Abstract 1. The specific viscosity of a dilute solution of polystyrene or rubber is strongly dependent on the nature of the solvent; the specific viscosity is high in a good solvent, and low in a poor solvent or a solvent-nonsolvent mixture. This has been interpreted as being due to changes in mean molecular shape. The specific viscosities of cellulose acetate solutions are not so sensitive to the nature of the solvent. 2. The extrapolated specific viscosity at the limit of solubility is in the same range for several different solvent-nonsolvent systems. 3. The effect of a temperature increase is to lower the specific viscosity of rubber or polystyrene solutions in a good solvent, but to increase the specific viscosity in a mixture of solvent and nonsolvent. 4. The specific viscosity of a dilute polystyrene solution is more nearly linear with concentration in a toluene-methanol mixture than in pure methanol. The quadratic term b in the equation: (ηsp=ac+bc2), is reduced relatively more than the linear term a by the presence of the nonsolvent.

scholarly journals Light Scattering of High Polymer Solutions

1946 ◽  
Vol 14 (1) ◽  
pp. 43-45 ◽  
Author(s):  
Jurg Waser ◽  
Richard M. Badger ◽  
Verner Schomaker
Keyword(s):  
Light Scattering ◽  
Polymer Solutions ◽  
High Polymer
Sign in / Sign up

Export Citation Format

Share Document