Abstract
Abstract Studies have been made of the effects of temperature and sample purity on the c.w., NMR line narrowing behaviour at high temperatures for the following rotator phase organic solids of intermediate entropies of fusion: perfluorocyclohexane, triethylenediamine, 2-bromo-2, 3, 3′-trimethylbutane, 2-chloro-2,3,3′-trimethylbutane, 2,3-dibromo-2,3-dimethylbutane and tetra-(fluoromethyl)-methane. The evaluated correlation times and activation energies for the solids of high entropy of fusion are equivalent to those for self-diffusion as measured by the radiotracer (or plastic deformation) technique. Proceeding to lower entropies of fusion there is a gradually increasing divergence between the two sets of data. It is proposed that this variation is a consequence of the way in which the different techniques reflect translational motion in systems with increasing defect disorder.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.