Table 5.
Comparison of Martens hardness (HM) values for samples before and after thermal treatment at 170°C for 1 h.
| Sample | HM |
|
|---|---|---|
| 25°C | 170°C (1h) | |
| PP | 31 | 490 |
| PP/GRA1 | 548 | 653 |
| PP/GRA2 | 378 | 405 |
| PP/GRA1Ti | 191 | 146 |
| PP/GRA2Zn | 269 | 224 |
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