Dear Narmadha Manoranjan, unless you give more details, the subject is rather classic. Attached is a recent document on the applicability of both techniques. My Regards
If you want to quickly check the CD properties of your polymers, there is a commercial CD spectrophotometer to use. You may find such tool in the Biology Department in your institue easily. Alternatively if you know the absorption spectra of your polymers, your can build up your own testing kits at certain wavelengths using circular polariser and two pair of linear polarisers, light source and detectors.