I need a solvent to be able to take NMR test from my samples PET-PBT blend. I will really appreciate if you can help me. I already tried DMSO, Chloroform, Water, and Ethanol.
I used deuterated trifluoroacetic acid, CF3COOD, for both 1H and 13C NMR of poly(ester-siloxanes) based on PBT and PDMS, as well as for PBT homopolymer. CF3COOD was used as a solvent and an internal standard. The results were quite good. Good luck!