NMR Test method for dispersion of solids in elastomer compositio

Details NMR Test method for dispersion of solids in elastomer compositio NMR Test method for dispersion of solids in elastomer compositio

1980-01-31

1981-11-17

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324308, G01N 2700

Patent

active

043014119

ABSTRACT:
An NMR test method is provided for determining the homogeneity of dispersion of a filler substance such as carbon black in an elastomer composition such as a rubber, either on an arbitrary scale or by reference to a standard dispersion of optimum homogeneity which is given the value 1.0 on a linear scale. The method involves measuring the intensity of the short component and the total intensity of the proton free induction decay, of a sample of the dispersion deriving the ratio P.sub.t of said intensities, and optionally deriving a second similar ratio P.sub.s from the standard dispersion to permit a value P.sub.t /P.sub.s on said linear scale to be derived.

REFERENCES:
patent: 3284700 (1966-11-01), Kingston
patent: 3525036 (1970-08-01), Bene

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