Determination of Total and Combined Sulfur in Butyl Rubber

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Abstract
Methylethyl ketone has been shown to be a much more effective solvent than acetone for the removal of extractable sulfur and certain accelerators from Butyl rubber vulcanizates in a standard Soxhlet extraction. The use of this extraction agent, together with combustion of the original and extracted samples in the Braun-Shell sulfur apparatus, provides a satisfactory procedure for determining the amounts of total and combined sulfur in Butyl compositions.

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