Has anyone can tell me. Why the acrylic functional group -C=C ( 1680-1660 cm-1 )of FTIR was gone?
This sample was use acrylic and urethane to synthesis.
I couldn't see the -C=C signal on my data.
Is it possible that the -C=O functional group (1780-1720 cm-1 ) signal is too strong lead to the C=C signal is cover?
Please help me! Thank you everyone.