Dynamics of Chain Molecules in Dilute Solutions, with Special Reference to Non-Newtonian Viscosity

Nature ◽  
1958 ◽  
Vol 181 (4608) ◽  
pp. 558-559 ◽  
Author(s):  
ROGER CERF
Keyword(s):  
Special Reference ◽  
Dilute Solutions ◽  
Newtonian Viscosity ◽  
Chain Molecules

Non-Newtonian viscosity and excluded volume effect of dilute solutions of flexible high polymers

1971 ◽  
Vol 75 (8) ◽  
pp. 1141-1149 ◽  
Author(s):  
Yoshihiko Sugiura ◽  
Noriko Yamaguchi ◽  
Koji Okano ◽  
Eiichi Wada
Keyword(s):  
Volume Effect ◽  
Excluded Volume ◽  
Dilute Solutions ◽  
Newtonian Viscosity ◽  
Excluded Volume Effect ◽  
High Polymers

THE SURFACE TENSION OF SLIGHTLY SOLUBLE FATTY ACIDS

1946 ◽  
Vol 24a (1) ◽  
pp. 8-14 ◽  
Author(s):  
D. G. Douglas ◽  
C. A. MacKay
Keyword(s):  
Fatty Acids ◽  
Surface Tension ◽  
Aqueous Solutions ◽  
Capillary Rise ◽  
Stable State ◽  
Melting Points ◽  
Considerable Time ◽  
Dilute Solutions ◽  
Chain Molecules ◽  
Capillary Rise Method

Surface tension measurements have been made on normal heptylic, pelargonic, capric, and lauric acids above their melting points and on aqueous solutions of heptylic, pelargonic, capric, and undecylic acids, at various concentrations. A modified capillary rise method was employed. The results indicate that the surface does not reach the stable state at once but requires considerable time, being slower for more dilute solutions and longer chain molecules. Evidence is given for the existence of a monolayer of closely packed molecules, with long axes perpendicular to the surface, each molecule occupying an area of approximately 25 Å for heptylic acid.

The Properties of Polymers in Solution. X. Ultrafiltrations of Rubber Solutions

1939 ◽  
Vol 12 (4) ◽  
pp. 774-777
Author(s):  
Kurt H. Meyer ◽  
Jean Jeannerat
Keyword(s):  
Colloidal Suspensions ◽  
Spherical Particles ◽  
Accurate Data ◽  
Colloidal Solutions ◽  
Dilute Solutions ◽  
Chain Molecules

Abstract It is a recognized fact that ultrafiltration is one of the most valuable methods for the study and treatment of colloidal suspensions formed of compact spherical particles. Not only is it possible to separate this type of particle from a solvent by means of a suitable ultrafilter, but it is also possible to determine the size of the particles by means of calibrated ultrafilters. Up to the present time, however, ultrafiltration has been utilized very little in the study of chain molecules, and no accurate data are available on the behavior of colloidal solutions of chain molecules during ultrafiltration. In the following discussion, the results of some experiments on the ultrafiltration of rubber solutions are described. Dilute solutions of rubber in toluene can be separated completely into rubber and solvent by ultrafiltration under pressure through fine ultrafilters with pores as fine as about 50 ḿ (“Fine” Cellafiltres and Membranfiltres). Solutions of crepe and solutions of masticated rubber give the same results.

Dielectric relaxation in dilute solutions of polar chain molecules

1957 ◽  
Vol 23 (103) ◽  
pp. 211-221 ◽  
Author(s):  
L. K. H. Van Beek ◽  
J. J. Hermans
Keyword(s):  
Dielectric Relaxation ◽  
Dilute Solutions ◽  
Chain Molecules
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