Abstract
A flexible polyurethane elastomer (PUE) is studied, and the improved impact-resistant performance is revealed. Compressive stress-strain curves over a wide loading rate range were derived. Under static loading, the rubbery-like characteristics are demonstrated, which are flexible and hyperelastic, to process a large strain of about 60% followed by full recovery upon unloading. Under high-rate loadingcompared with the mechanical data of polyurethane elastomer (PUE) and polyurea (PUA) materials in the literature. Orderly parallel deformation bands were formed from carrying a large strain. The fibrils were found between deformation bands for enhancing the yield/plateau stress. A considerable plastic zone ahead of propagating crack with numerous crazes and microcracks was produced for realizing the dynamic strain energy absorption. This work presents a scientific innovation for developing outstanding impact-resistant polyurethane elastomers for transparent protection engineering.
| Original language | English |
|---|---|
| Article number | 467 |
| Journal | Polymers |
| Volume | 11 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Mar 2019 |
Keywords
- Energy absorption
- Impact-resistant performance
- Plastic zone
- Polyurethane elastomer
- Strain rate