Rotating frame proton spin‐lattice relaxation measurements of poly (ethylene oxides)
- 1 March 1988
- journal article
- research article
- Published by Wiley in Journal of Polymer Science Part B: Polymer Physics
- Vol. 26 (3) , 527-531
- https://doi.org/10.1002/polb.1988.090260305
Abstract
Measurements of Tlρ as a function of temperature have been made on two polyethylene oxides (PEO) with molecular masses of 5,000 and 30,000. The T1ρ measurements show biexponential behavior of the relaxation function in the temperature range from 170 K to 350 K. The intensities of the components of the relaxation function are constant over this temperature range in agreement with the crystallinities of the samples. The two relaxation times can be associated with the crystalline and amorphous component; the relaxation time minima describe the α relaxation in the crystalline regions of PEO and the glass transition in amorphous PEO.Keywords
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