Citation: NI Shaoru, SHEN Lianfang, YU Fusheng, QIAN Baogong. CARBON-13 NMR STUDY ON MOLECULAR MOTION OF 1, 2-POLYBUTADIENE——TEMPERATURE DEPENDENCE OF MOLECULAR MOTION[J]. Chinese Journal of Polymer Science, ;1986, 4(3): 235-240. shu

CARBON-13 NMR STUDY ON MOLECULAR MOTION OF 1, 2-POLYBUTADIENE——TEMPERATURE DEPENDENCE OF MOLECULAR MOTION

Received Date: 1 September 1985

Proton-decoupled, 13C FT-NMR (operating at 50.3 MHz) is used to determine spin-latticerelaxation time (T1), nuclear Overhauser enhancement (NOE), linewidth and chemical shift of 1,2-polybutadiene as a function of temperature in CDCl3 solution and the temperature dependence ofmolecular motion of 1,2-polybutadiene has been investigated with these NMR relaxation parameters.It is found that jumps of NOE and linewidth vs. temperature appear between-1℃ and -30℃. Theminimum of nT1 vs. temperature for all carbons occur at about -45℃.
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