ASTM D6844-10 Method is used for silanes is used in rubber formulations. The average sulfur chain length is an important parameter in determining the behavior of the silane in a rubber mixture.
Scope:
ASTM D6844-10 test method characterizes silanes of the type bis-(triethoxysilyl-propyl) sulfane by high performance liquid chromatography (HPLC).
Test Procedure:
In this test method, a sample of the silane is analyzed by HPLC to determine the polysulfide distribution. Sulfur Chain Distribution calculations are performed using the response factors for the individual silane (sulfur chain length). The amount of free elemental sulfur can be determined from the chromatogram. There are two methods, one with a constant composition of the mobile phase (isocratic), and another with using a gradient. Both methods produce similar chromatograms.
Specimen size:
A sample of silane in gm.
Data:
ASTM D6844-10 test method data is provided as chromatograms with relevant compound peaks.
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