Signal restoration for NMR imaging using time-dependent gradients

1984 ◽  
Vol 17 (7) ◽  
pp. 612-616 ◽  
Author(s):  
J Frahm ◽  
W Hanicke
Keyword(s):  
Time Dependent ◽  
Nmr Imaging ◽  
Signal Restoration

Applications of NMR imaging to the time-dependent swelling effect in polymers

1996 ◽  
Vol 6 (5) ◽  
pp. 313-322 ◽  
Author(s):  
D.H. Lee ◽  
R.K. Ko ◽  
Z.H. Cho ◽  
S.S. Kim
Keyword(s):  
Time Dependent ◽  
Nmr Imaging

Characterization of Stressed and Crosslinked Polymers by 13C-CP/MAS and NMR Imaging

1990 ◽  
Vol 217 ◽  
Author(s):  
Winfried Kuhn ◽  
Isolde Theis ◽  
Elmar Koeller
Keyword(s):  
Chemical Composition ◽  
Physical Properties ◽  
Chemical Reactions ◽  
Bulk Material ◽  
Mechanical Strain ◽  
Time Dependent ◽  
Nmr Imaging ◽  
Physical Behavior ◽  
Aging Conditions

ABSTRACTAging of polymers and elastomers is a time dependent alteration of the chemical composition and physical properties depending on the aging conditions. Chemical reactions and hence changes in the chemical composition result in many cases from influence by oxygen or solvents and treatment of the bulk material at high temperatures. Aging of the materials by mechanical strain as well as in an oxidative manner can alter the ratio of amorphous to crystalline portions in the polymer, break chemical bondings and hence can alter the physical behavior of the materials.

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