Thermal analysis applied to discarded car bumpers

The thermal properties of discarded bumpers from standard grade automobiles were compared to the corresponding data obtained from binary and ternary b lends of virgin polyolefins of composition similar to the recycled product. After grinding and separating by specific gravity, the recycled material w as identified by DSC, DMTA, TGA and C-13 NMR. We found that it contains thr ee polymers: polypropylyene (PP) as the major component, ethylene, propylen e, diene methylene terpolymer (EPDM) and a small amount of high density pol yethylene (HDPE).