Chemistry: analytical and immunological testing – Hydrocarbon – Acyclic
Patent
1989-06-06
1991-01-08
Warden, Robert J.
Chemistry: analytical and immunological testing
Hydrocarbon
Acyclic
436142, 436 85, 436161, 422 70, 73611C, 2101982, 210656, G01N 2100
Patent
active
049835289
ABSTRACT:
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.
REFERENCES:
patent: 4728344 (1988-03-01), Stacy
Harrison et al, "Aging of Pressure Sensitive Adhesives, II: Use of Multi-Detector Sec", Journal of Liquid Chromatography, vol. 6, pp. 2723-2737 (1983).
Grinshpun et al, "SEC of Copolymers", Polymeric Materials in Science and Engineering, vol. 54, pp. 174-179 (1986).
Del Rios, "Characterization of Polymers and Additives Utilizing a New Differential Refractometer and Absorbance Detector", Paper No. 346, Pittsburgh Conference and Exposition, Mar. 1986.
Kohn, "Size Exclusion Chromatography (XII) Analysis of Silicon-Phenyl Groups in Molecuylar Weight Components of Polydimethylsiloxanes", U.S. Government Report DE 86015001, Aug. 1986.
Polysar Limited
Redding David
Warden Robert J.
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