ISSN:
0360-6376
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Techniques for measuring gel contents of elastomers by liquid exclusion chromatography are described. Chromatographic methods are based on solubilizing aqueous latex in a water-miscible elastomer solvent. The resulting mixture of solubilized elastomer and dispersed gel particles is separated and analyzed by liquid chromatography, columns packed with porous glass particles and a differential refractometer detector being used. Applicability of these techniques is illustrated with results for typical nitrile elastomers in methyl ethyl ketone. Chromatographically measured gel contents in the range 30-80% gel were in good agreement with those measured by a classical, 3-day static method. Repeatability of chromatographic measurement was ±1.35% gel. The entire analysis, including solution preparation, required less than 1 hr and can be as short as 10-20 min.
Additional Material:
9 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1975.170130710
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