Total Carbon Black in Polyolefin Determination
The first step of the analysis is a pyrolysis of the material at 500oC. The subsequent step is a calcination of the remaining sample at 900oC. The carbon black content is expressed as a percentage by mass, through the following formula: (m2-m3)/m1 x 100, where m1 = the mass, in grams, of the test portion | m2 = the mass, In grams, of the sample boat plus the test portion after pyrolysis at 500oC | m3 = the mass, in grams, of the sample boat after calcination at 900oC, with ash where appropriate. | The analysis has to be carried out in threefold and the arithmetic mean is reported. The ash yield is expressed as a percentage of the original mass from the formula: (m3-m)/m1* 100 where m = the mass, in grams, of the sample boat .| m1 and m3 as above.
The following apparatus are used
* Dreschel Bottle
* Bubbler bottle
* Pyrex reactor tube
* Glass tubing plus matching rubber & pastic
* Bunsen Burner
* Flow meter
* Neoprene stoppers with glass tubes
* Ground glass stopper
* Solid Tube furnace
* Muffle furnace
* Iron-Constantan Thermocouple
* LED Temperature Indicator
* Zirconia Combustion Boat
* Desiccator with desiccant
The following reagents and Materials are used
* Carbon dioxide (drye Ice)
* Dessicant, such as CaCL2
* Nitrogen, Low oxygen content (see ASTM)
The MicrOptik total carbon in olefin plastics package contains all hardware required to carry out the analysis, as well as a full procedure. The procedure can be provided in all languages.
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