ISSN:
1573-6784
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
Notizen:
Abstract The proton relaxation behavior of a temperature-sensitive gel, observed through using a pulse NMR technique, was related to the structural characteristics of the gel. As the temperature increased, the pore size of the gel decreased gradually while the relaxation time constants, T and T, showed different patterns of change. It is believed that the proton relaxation was affected by a direct temperature effect and an indirect, temperature-related structural effect. The response of the protons to these effects varied depending on where the protons resided. A sudden increase in several NMR parameter values occurred at around 30°C, the lower critical solution temperature (LCST). This may be related to a transition state of the gel undergoing dramatic local non-uniform changes around the LCST.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1018442622707
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