Citation: JIA Mingchun, SHEN Lianfang, QIAN Baogon, ZHANG Baozhen, YAO Shuren. STUDY OF THE MOLECULAR MOTION AND COMPATIBILITY IN AB-CROSSLINKED POLYMER BASED ON POLYURETHANE AND POLYSTYRENE-co-ACRYLIC ACID BY SOLID STATE HIGH RESOLUTION NMR*[J]. Chinese Journal of Polymer Science, ;1994, 12(1): 33-43. shu

STUDY OF THE MOLECULAR MOTION AND COMPATIBILITY IN AB-CROSSLINKED POLYMER BASED ON POLYURETHANE AND POLYSTYRENE-co-ACRYLIC ACID BY SOLID STATE HIGH RESOLUTION NMR*

Received Date: 28 June 1992

The 13C T1s of --CH3 side group in PPU/P (St-co-AA), AB-crosslinked polymers (i. e.ABCP) was studied by using high resolution solid state NMR. The rotation motion of --CH3 sidegroup in PPU was analyzed by means of the average spectral density functions of internal rota-tion. The results showed that the rotation of the --CH3 side group is related closely to the com-patibility between the two components. The compatibility was studied by analyzing the protonspin-lattice relaxation in rotating frame, spin-spin relaxation and spin-diffusion.The results showed that the hydrogen bonds between the components play a major role in determining the compatibility.Through spin diffusion studying,the soft phase domain size was calculated.By studying proton spin-spin relaxation,the content of each component in each phase and that of each phase in the samples can be obtained.The result shows that the content of interphase is related closely to the compatibility.
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