Measurement of unsaturation level in butyl and epdm rubbers

G - Physics – 01 – N

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150/19, 73/93

G01N 30/06 (2006.01) G01N 30/46 (2006.01) G01N 33/44 (2006.01) G01N 30/88 (2006.01)

Patent

CA 2017967

Abstract Measurement of Unsaturation Level in Butyl and EPDM Rubbers A method is provided for quantitatively determining the amount of unsaturation in butyl and EPDM rubbers using a gel permeation chromatograph in combination with an ultraviolet detector. Placement of a differential refractive index detector in series with said ultraviolet detector provides a method for the simultaneous measurement of the amount of unsaturation, the molecular weight distribution and the amount of antioxidant in said rubbers.

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