Analysis of Conditions of Curable Resin by Use of
Pulse NMR (Nuclear Magnetic Resonance)

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Summary

It is possible to compare the degree of hardening of epoxy and other thermoplastic resins and analyze the hardening process from the changes in the molecular mobility by using pulse NMR.
No matter what shape the measurement sample may have or no matter what inorganic matter the measurement same may contain, the measurement can be made in a short time, using a small amount.

Analysis of the degree of hardening of resin by use of pulse NMR (image figures)

Approximate analysis of 3 components by use of pulse NMR
and the molecular mobility of the polymer chains

Schematic diagram of crosslinked polymer

Hard component: In state in which there is little or no molecular mobility due to crosslinking
Mid component: In state in which molecular mobility is restricted due to crosslinking
Soft component: In state in which crosslinking has little effect and the molecular chains can move

Example of practice: Comparison of the hardening degree of epoxy resin that differs according to the difference in hardening conditions

Change with time in reaction process (amount of uncured components)

Hardened state after 30-min hardening reaction
  Condition A () Condition B ()
Hard 28% 46%
Mid 50% 40%
Soft 22% 14%

Search Number 1033

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