Sorption and Diffusion in Polymers

Nature ◽  
1968 ◽  
Vol 218 (5139) ◽  
pp. 355-356 ◽  
Author(s):  
A. C. NEWNS
Keyword(s):  
Diffusion In Polymers ◽  
And Diffusion

Investigation of swelling and diffusion in polymers by NMR imaging

1999 ◽  
Vol 145 (1) ◽  
pp. 83-94 ◽  
Author(s):  
Manfred Knörgen ◽  
Uwe Heuert ◽  
Horst Schneider ◽  
Dirk Kuckling ◽  
Sven Richter ◽  
...  
Keyword(s):  
Nmr Imaging ◽  
Diffusion In Polymers ◽  
And Diffusion

Interaction between Stress and Diffusion in Polymers

2006 ◽  
Vol 258-260 ◽  
pp. 447-452 ◽  
Author(s):  
Katell Derrien ◽  
Pierre Gilormini
Keyword(s):  
Boundary Condition ◽  
Diffusion Process ◽  
Chemical Potential ◽  
Moisture Uptake ◽  
Moisture Capacity ◽  
Material Parameters ◽  
Diffusion In Polymers ◽  
And Diffusion

When moisture uptake in a polymer is associated with swelling, it induces stresses which interact with the entire diffusion process. This coupling is addressed in this paper, which extends immediately to the diffusion of other fluids, like solvents. First, the generalized chemical potential is used to analyze the effect of stresses on the moisture capacity of polymers, and a relation is derived as a function of material parameters. Then, the interactions between stress and diffusion before saturation is reached, are explored. Various effects are predicted on the classical sorption test, such as an evolution of the boundary condition with time, and a sorptiondesorption hysteresis.

Investigation of swelling and diffusion in polymers by 1H NMR imaging: LCP networks and hydrogels

2000 ◽  
Vol 554 (1) ◽  
pp. 69-79 ◽  
Author(s):  
M Knörgen ◽  
K.-F Arndt ◽  
S Richter ◽  
D Kuckling ◽  
H Schneider
Keyword(s):  
1H Nmr ◽  
Nmr Imaging ◽  
Diffusion In Polymers ◽  
And Diffusion

Effects of Self-Diffusion and Inter-Diffusion in Polymer Systems

1964 ◽  
Vol 37 (5) ◽  
pp. 1153-1177 ◽  
Author(s):  
S. S. Voyutskii ◽  
V. L. Vakula
Keyword(s):  
Soviet Union ◽  
Practical Significance ◽  
Polymer Systems ◽  
Self Diffusion ◽  
The Soviet Union ◽  
Diffusion In Polymers ◽  
Molecular Substances ◽  
Object Of Study ◽  
And Diffusion ◽  
Correlate Data

Abstract Diffusion of low-molecular substances in high polymers has been the object of study by many Soviet and other investigators during the past two decades. Included is the work of Reitlinger, Zhurkova, Ryskin, Malinskii, and Vasenin in the Soviet Union, and Barrer, Crank, Long, Auerbach, van Amerongen, McCall, Shtamm, and many other authors elsewhere. By way of contrast, the effects of self-diffusion in polymers and diffusion of polymer in polymer (inter-diffusion) have been given little study because of the great experimental difficulties and the complexity of theoretical explanations. Meanwhile, these effects have considerable scientific and practical significance. As will be seen hereafter, very many properties of polymers are associated in some manner with diffusivity of macromolecules or their segments. No less important is the tendency toward self- and inter-diffusion of polymers in processing and use. The aim of this review is to correlate data concerning self- and inter-diffusion of polymers containing elastic molecules (elastomers), available in several studies, and to suggest further paths for investigation of this problem.

New Pressure-Decay Techniques to Study Gas Sorption and Diffusion in Polymers at Elevated Pressures

2004 ◽  
Vol 43 (6) ◽  
pp. 1537-1542 ◽  
Author(s):  
Peter K. Davis ◽  
Gregory D. Lundy ◽  
John E. Palamara ◽  
J. Larry Duda ◽  
Ronald P. Danner
Keyword(s):  
Gas Sorption ◽  
Pressure Decay ◽  
Elevated Pressures ◽  
Diffusion In Polymers ◽  
And Diffusion
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