I am comparing two polymeric tarpaulin materials, that should be the same (they have a lot of similar characteristics like color, size, elemental composition etc.). I did a FTIR analysis that said that both of these materials have polyethylene and CaCO3 in them, but one of the materials consistently shows peaks at 1539 and 1575cm-1, could they have originated while being held in poor conditions (one of the tarpaulins was held in a ditch for a long time), or is that just a difference in production batches?
Dear Elza El, if there is no oxygenated groups occured at PE chains due to oxidation, the absorption at the mentioned bonds may be also attributed to CO (stretching) of the CaCO3 filler. My Regards
Thank you for your answer! After SEM/EDS analysis both of these materials had the same elemental composition, there wasn't that that big of a difference in the Ca quantity, so i would assume that the CaCO3 filler composition is more or less the same for both of the materials. So then could it be the oxidation, because of the different conditions for one of the tarpaulins?
Yes and most probably! Other tests my confirm or exclude such an assumption. NMR may bring further elucidation.
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