✦ LIBER ✦
Visualization of residual anisotropic interactions in crosslinked natural rubbers by dipolar local field measurements and 2H natural abundance NMR spectroscopy
✍ Scribed by Cédric Malveau; Piotr Tekely; Daniel Canet
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 785 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0926-2040
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✦ Synopsis
An extension of the exploitation of indirect observation of 'H nuclei through 13C resonances is presented in the case of crosslinked elastomers. It is demonstrated that, by using this method in vulcanized elastomers above Tg, a direct visualization of residual dipolar interactions on different functional groups as well as their dependence on motional constraints is available. It is also shown that 2H natural abundance NMR spectra of elastomers provide similar information on motional constraints by way of residual quadrupolar interactions. 0 1997 Elsevier Science B.V.