Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Viscosity
Patent
1979-01-05
1980-10-28
Goldberg, Gerald
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Viscosity
264 402, 356386, G01N 1104, G01B 1108
Patent
active
042299705
ABSTRACT:
The rheological properties of an extrudable material can be measured by extruding a strand of the material, measuring its diameter continuously, to give a series of diameter values, interpreting the variations in the strand diameter so as to characterize the surface of the strand, and deriving rheological data from the surface characteristics of the strand. The variations in the strand diameter can be interpreted as to peak-to-peak amplitude, average diameter value, the frequency of significant extreme values, standard deviations from a mean value, and the like. By means of these mathematical characterizations, the rheological behavior of the extrudable material can then be derived. The scorch behavior of a curable elastomer can be measured. The heterogeneity of a rubber compound can be described, or the macromolecular properties of a polymer can be measured (such as "gel", or degree of cross-linking.)
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Tokita, N. et al., The Dependence of Processability on Molecular Weight Distribution of Elastomers, in Rubber Chemistry and Technology, (46), pp. 1166-1187, 1973.
Vegvari, P. C. et al., Measurement of Carbon Black Dispersion in Rubber by Surface Analysis, in Rubber Chemistry and Technology, (51), pp. 817-839, 1978.
Barker Robert I.
King David P.
Rice Patrick F.
Goldberg Gerald
Monsanto Company
Roskos Joseph W.
Seward Gordon B.
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