STUDY OF THE MOLECULAR MOTION IN POLYEPICHLOROHYDRIN BY HIGH RESOLUTION NMR

摘要

The molecular motion in polyepichlorohydrin （PEPCH）, in solution and bulk, was studied by high resolution NMR by means of line width, spin-lattice relaxation time T1 and nuclear Overhauser effect NOE. The results show that the VJGM model can describe the main chain motion of PEPCH in solution perfectly. In bulk state, the relationship between the line width and the temperature is consistent with WLF equation, but that between the high frequency molecular motion correlation time （in T1 scale ） and temperature is consistent with Arrhenius equation. The motion parameters of PEPCH in both states were calculated. The internal rotation motion of side—CH2Cl group was analyzed by using equal three-site jump and diffusion internal rotation model in both states.