Carbon Black In Olefin Plastics
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ASTM D1603
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Scope:
Determination of carbon black content in Olefin materials like polyethylene or polypropylene that do not contain nonvolatile additives or fillers. The test is often used as a quality control measurement for black polyolefins.
Test Procedure:
A sample of known weight is placed into a weighed combustion boat. The sample is then placed into a 600°C tube furnace under a dry oxygen free Nitrogen purge. After a set time the combustion boat with the burn residue is cooled under the nitrogen purge and weighed. The combustion boat is then placed into a 600°C muffle furnace to oxidize the carbon residue. When the carbon is completely oxidized the combustion boat is cooled and weighed.
Specimen size:
One to a few grams
Data:
The percent carbon black =
(Wr - Wo) x 100
Ws
Wr = the mass of the residue from the tube furnace
Wo= the mass of the residue from the muffle furnace
Ws= the original mass of the sample
Equipment Used:
Tube furnace Muffle furnace
Combustion boat Analytical balance
Oxygen free nitrogen Flow meter
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