Flowing-boundary diffusion cell and the determination of zero-time correction in free diffusion measurements in very dilute polymer solutions with a polarization interferometer

1971 ◽  
Vol 36 (12) ◽  
pp. 4046-4053 ◽  
Author(s):  
B. Porsch ◽  
M. Kubín
Keyword(s):  
Boundary Diffusion ◽  
Polymer Solutions ◽  
Diffusion Cell ◽  
Free Diffusion ◽  
Dilute Polymer Solutions ◽  
Polarization Interferometer ◽  
Time Correction ◽  
Zero Time

A simple and exact method for calculating diffusion coefficients from the data of polarization interferometer. Extension to the case of polymers with narrow distribution of molecular weight

1981 ◽  
Vol 46 (12) ◽  
pp. 3018-3026 ◽  
Author(s):  
Bedřich Porsch ◽  
Lars-Olof Sundelöf
Keyword(s):  
Molecular Weight ◽  
Diffusion Coefficient ◽  
Diffusion Coefficients ◽  
Binary Systems ◽  
Sufficient Accuracy ◽  
Average Value ◽  
Polarization Interferometer ◽  
Time Correction ◽  
Broad Molecular Weight Distribution ◽  
Zero Time

The simple equation derived previously for calculating the diffusion coefficient and the zero-time correction from the data of the polarization interferometer is shown to be valid not only in the case of binary systems but also for the diffusion of polymer solutes with moderately broad molecular weight distribution and results in a diffusion coefficient, which is an average value of a well-defined type. In addition, it is shown experimentally that the equation is applicable with sufficient accuracy also to the evaluation of diffusion coefficients of polymers having a polydispersity index as high as Mw/Mn = 2.

Determination of grain-boundary diffusion of Ag in nanocrystalline Cu by the Hwang–Balluffi method

2001 ◽  
Vol 89 (7) ◽  
pp. 3971-3975 ◽  
Author(s):  
Z. Erdélyi ◽  
Ch. Girardeaux ◽  
G. A. Langer ◽  
D. L. Beke ◽  
A. Rolland ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Boundary Diffusion ◽  
Grain Boundary Diffusion
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