What sort of polymer can be tested?
Essentially almost all thermoplastics used in production. PE, LLDPE, LDPE, HDPE, PP PC, PA, EPDM, PET, PS, PSu, polymer blends, polymer alloys, filled polymers, bio-polymers and many, many more. If it can be melted and a pressure can be measured on driving the material through the die, characterisation by rheometry stands a good chance of being successful.