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od 2020-09-20

Title: NMR study of molecular motion in poly(ethylene oxide)

Source: Polymer Bulletin

Year : 1981

Abstract:

Proton second moment and spin-lattice relaxation times T1, T1r and T1D for helical poly (ethylene oxide) 5000 over a wide temperature range are measured. The results of CW and pulse experiments corroborate the existence of a motional process in the crystalline region of the polymer interpreted as oscillation or rotation of molecules around their helical axes. The activation energy for this type of motion is found to be 12 kcal/mole

DOI: 10.1007%2FBF00254713   (Pobrane:  aktualizowanie)