[lexi7_]

i'm having trouble with this FTIR spectrum i took of an "unknown" polymer, and i'm not sure what the (double) peak at 2360 is supposed to represent?

i searched online and only found CO2, but based on TGA and DSC analysis performed on the polymer i should have PET, so CO2 doesn't make any sense? so yeah i'm a bit lost

[rjb]

Hi Lexi,

CO2 (from the atmosphere) is a distinct possibility...
How are you creating your background and could you purge with something like nitrogen maybe?

R