Yes possible, refer following site may help in various polymers

http://www.ftir-polymers.com/soon.htm

Are you using a microscope attachment to look at individual particles or are you taking the IR of a sample that has a mixture of different polymers?

for the first case, most IRs have a digitized search.

the second is much more difficult.

YOU CAN USE SOME REFERENCE TABLE WHERE IDENTIFY THE WAVENUMBER WHICH A FUNCTIONA GROUP APPEARS. HERE ATTACH YOU WILL FIND AN EXAMPLE OF THOSE TABLES