Temperature and frequency dependence of longitudinal proton relaxation times in sonicated lecithin dispersions
β Scribed by A.C. McLaughlin; F. Podo; J.K. Blasie
- Book ID
- 115722110
- Publisher
- Elsevier Science
- Year
- 1973
- Tongue
- English
- Weight
- 733 KB
- Volume
- 330
- Category
- Article
- ISSN
- 0005-2736
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π SIMILAR VOLUMES
The temperature dependences of the proton spin-lattice, Tt, and spin-spin, T2, relaxation times of isotactic polypropylene films with different thermal histories and atactic fraction were investigated. A T~ minimum occurs for both melt-quenched and annealed samples at about 70Β°C. It shifts to lower
The proton spin-spin rebxation time for liquid chloroform has been measured over the temperature range -54" to +9O"C. The values of Ta(H) decrease with increasing temperature contrary to the behavior obsemed for Tr (H). Values of Tz (I-l) calculated from experimental values of Tr (H) and Tz(Cl) repr
Proton spin-lattice, T~, and spin-spin, T 2, relaxation times of highly stretched isotactic polypropylene film were measured in the temperature range 40-110Β°C. There is a monotonical increase in T~, when measured at 40Β°C, as the stretching ratio is increased. A shorter T I, Tis, was observed for all