Abstract
AbstractThe concept of the relaxation time in the rotating frame, T1p, is introduced and compared with the more familiar spin‐lattice relaxation time T1. The experimental requirements for measuring T1p are briefly discussed. The relationship between T1 and T1p and molecular correlation times, τc, and activation energies, ΔE, for motions is indicated. T1p data for a number of polymers, i.e. polyethylene oxides, polypropylene oxide, stereoregular forms of polymethyl methacrylate and starch are briefly discussed and compared with other T1p data for polymers in the literature. The advantages of making relaxation measurements in the rotating frame are pointed out and a number of difficulties connected with spin‐diffusion mechanisms and determinations of crystallinity are discussed.
References
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Dates
Type | When |
---|---|
Created | 18 years, 5 months ago (March 20, 2007, 5:31 p.m.) |
Deposited | 1 year, 9 months ago (Nov. 23, 2023, 12:26 a.m.) |
Indexed | 1 year, 6 months ago (Feb. 9, 2024, 5:21 a.m.) |
Issued | 56 years, 4 months ago (May 1, 1969) |
Published | 56 years, 4 months ago (May 1, 1969) |
Published Online | 18 years, 9 months ago (Dec. 4, 2006) |
Published Print | 56 years, 4 months ago (May 1, 1969) |
@article{Connor_1969, title={Studies of molecular motions and phase transitions in polymers using the rotating frame magnetic resonance method}, volume={1}, ISSN={1934-256X}, url={http://dx.doi.org/10.1002/pi.4980010303}, DOI={10.1002/pi.4980010303}, number={3}, journal={British Polymer Journal}, publisher={Wiley}, author={Connor, T. M.}, year={1969}, month=may, pages={116–122} }