ISSN:
0959-8103
Keywords:
gelatin
;
polyelectrolyte
;
diffusion
;
interferometry
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Concentration relations for mutual diffusion coefficients Dm(C) in water of polyelectrolyte gelatin macromolecules at different temperatures were studied by optical interferometry. It is shown that Dm(C) values are in agreement with scaling predictions and are similar to those observed for solutions of neutral macromolecules under θ-conditions. However, they are greatly influenced by the square-law term C2, having a correlation to the conventional scaling law Dm ∝ C, and the mobility of solution components is influenced by physical gelation processes under certain thermodynamic conditions. It is demonstrated that the temperature relation of the diffusion coefficient at infinite dilution D0(C → 0) for the three gelating samples with various physico-chemical properties can be described by a universal function.
Additional Material:
9 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pi.1994.210330403
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