Evaluation of Molecular Mobility by Use of Pulse NMR

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Summary

The evaluation of molecular mobility by use of pulse NMR makes it possible to investigate (1) the difference in high order structures, (2) changes in conditions with temperature, (3) correlation with physical properties of materials, (4) changes with time in crosslinking reaction, and ⑤ mobility of water particle in electrolyte film.

① Difference in crystalline and noncrystalline structure of PP

Ratio of presence of crystals and noncrystals of PP and mobility of molecular chains can be known.

② Change in conditions with PU temperature

Melting process of hard component (crystal) of thermoplastic urethane can be observed.

③ Difference in resilience of urethane

If the molecular weight of polyol in flexible urethane foam is high, the molecular mobility is high, and the resilience is high.

④ Change with time of epoxy crosslinking reaction

Analysis of change with time in thermosetting reaction process of epoxy is possible.

⑤ Water mobility in electrolyte film

Water cluster size in the film that has a correlation with proton conductivity in electrolyte film is evaluated by SAXS, and water mobility by pulse NMR.

Search Number 1046

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