If we see thermal analysis of any material with and without iron impregnation, the material will decompose at low temperatures when iron is present in it compared the pristine one. what is the reason for this phenomenon?
Can you give an example of a material that if it has iron it will be unstable? It is not clear what you are working on.
Dear Md. Kooti sir,
I am working on carbon nanotubes. Recently i did TGA measurements for CNTs with and without impregnation of iron oxides, from results what i observed is iron oxide assisted CNTs are decomposing at early temperatures compared to pristine sample. What could be the possible reason for it.
Thanks.
Seemingly of some possible interest to your query ― yet on polypropylene yellowing due to thermal degradation: https://www.researchgate.net/post/Why_the_color_polypropylene_compound_granules_turned_to_yellow_with_a_disgusting_smell
Dear Surakanti Srinivas Reddy
The resone is that iron oxide particles will act as a catalyst for carbon combustion.
Dear Surakanti Srinivas Reddy,
Exact reason for this is Heat soak ΔE of iron oxide is very less.
Generally, the hydrated ferric oxide decomposition is just 180° C. For the ferroso-ferric oxide and a heat soak ΔE of at most about 4.0 for the hydrated ferric oxide and about 5.0 for the ferroso-ferric oxide. Therfore, a thermally stable oxide product comprising particulate iron oxide coated with an insoluble metal such as aluminum, barium, calcium, magnesium, iron or zinc in the amount of at least 1 percent by weight is advised and based on that decomposition temperature of at least can be increased by additional 500 C (≈ 230° C).Some stability can come.
Ashish
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