Make your own polystyrene film standard for IR spec use.
http://xylene.chem.uofs.edu/~cab302/courses/363-1.htm (http://xylene.chem.uofs.edu/~cab302/courses/363-1.htm)
Here's the spectrum taken by a Perkin Elmer model 700 IR spec in 1968. I have a copy of another polystyrene spectrum with better resolution that I got from the library.
http://wsphotofews.excite.com/030/Ur/gu/lp/XU57338.jpg (http://wsphotofews.excite.com/030/Ur/gu/lp/XU57338.jpg)
http://www.geocities.com/dritte123/PSPF.html
The first link stopped working for some reason. It was about making your own polystyrene film standard for IR specs. Just mix 1 g of polystyrene foam with about 4-5 ml of acetone or toluene, pour on a glass plate and let dry.
Looks like the link works sometimes and other times it doesn't, so I uploaded it here. http://www.geocities.com/dritte123/363-1.htm (http://www.geocities.com/dritte123/363-1.htm)
http://www.geocities.com/dritte123/PSPF.html