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FORD FLTM AV 102-01
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FORD FLTM AV 102-01 August 30, 2000 DETERMINATION OF PERCENT SILICA-PRODUCING VOLATILES IN SILICONE RUBBER ADHESIVES/SEALERS WHICH CURE AT ROOM TEMPERATURE
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Description / Abstract:
Scope
The procedure consists of four basic steps: 1) the RTV sealant is cured to its elastomeric form; 2) the volatiles are extracted from the cured sealant; 3) the extract is separated and measured by gas chromatography; and, 4) the GC results are quantified using a siloxane calibration. The volatile silicones from a commercial RTV sealant are primarily cyclodimethyl-siloxane. Other species present having GC retention times similar to those of the cyclics are assumed to be silicone as well.
The procedure consists of four basic steps: 1) the RTV sealant is cured to its elastomeric form; 2) the volatiles are extracted from the cured sealant; 3) the extract is separated and measured by gas chromatography; and, 4) the GC results are quantified using a siloxane calibration. The volatile silicones from a commercial RTV sealant are primarily cyclodimethyl-siloxane. Other species present having GC retention times similar to those of the cyclics are assumed to be silicone as well.