Table 2.
Selected test results of xenon-arc light accelerated weathering.
| Matrix/NF | NF, ratio | Test period | Mechanical properties loss, % |
Reference | |
|---|---|---|---|---|---|
| Strength | Modulus | ||||
| PVC/maple | 15 phr | 2600 h | +7 | 3 | [11] |
| 30 phr | 5 | 9 | |||
| 45 phr | 12 | 14 | |||
| PP/conifer wood | WF 25% | 8 weeks | 18 | n.d. | [12, 21] |
| WF 50% | 25 | n.d. | |||
| WF 25% + CA | 17 | 15 | |||
| WF 50% + CA | 22 | 24 | |||
| HDPE/pine | WF 49% + lub (Ex) | 3000 h | 34 (UV + ws) | 52 (UV + ws) | [13] |
| +1 (UV) | 12 (UV) | ||||
| WF 49% + lub (M) | 32 (UV + ws) | 41 (UV + ws) | |||
| 10 (UV) | +22 (UV) | ||||
| PP/pine | WF 40% (uBl) + CA | 1000 h | 13 | 11 | [21, 28] |
| WF 40% (Bl) + CA | 17 | 11 | |||
| PPr/pine | 50% | 2000 h | 19 | 10 | [29] |
| 50% + CA | 9 | 8 | |||
NF - natural fibres; CA - coupling agent; lub - lubricant; Ex - extrusion; M - molding: Bl - bleached; uBl - unbleached; r - recycled; ws - water spray.