Study of filled polyethylene by pulse nuclear magnetic resonance

The pulse NMR method using the spin echo technique at the frequency 21 MHz has yielded the temperature dependences of the spin-lattice T1 and spin-spin T2 relaxation times in samples of LDPE filled with disperse carbon black, aluminium and bronze powders. In the temperature interval 200–450 K in the samples two phases of the macromolecules characterized by different degrees of retardation of motion were found to be present. In the temperature...