Method and apparatus for measuring the rheological...

Details Method and apparatus for measuring the rheological... Method and apparatus for measuring the rheological...

G - Physics

01

N

354/30, 73/81

G01N 11/00 (2006.01) G01N 11/02 (2006.01) G01N 33/44 (2006.01) G01N 3/00 (2006.01)

Patent

CA 1139587

43-1025A APPLICATION FOR LETTERS PATENT FOR METHOD AND APPARATUS FOR MEASURING THE RHEOLOGICAL PROPERTIES OF AN EXTRUDABLE MATERIAL ABSTRACT OF THE DISCLOSURE 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 character- izations, 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.)

343045

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