Table 3. Average To and Ta Values for Five SCC Rocking Cell Tests with 2500 ppm Polymer Unless Otherwise Indicateda.
| entry | polymer | av. To (°C) | st. dev. for To (°C) | av. Ta (°C) |
|---|---|---|---|---|
| 1 | no additive | 17.9 | 0.7 | 17.0 |
| 2 | PVP (Mn 8000 g/mol)29 | 13.6 | 0.4 | 10.5 |
| 3 | PVPip (Mn 3280 g/mol)30 | 10.5 | 0.3 | 9.2 |
| 4 | PVCap (Mn 2600 g/mol)27 | 10.1 | 0.3 | 9.6 |
| 5 | POVPip | 13.9 | 0.4 | 13.7 |
| 6 | OVPip:OVCap 80:20 | 13.9 | 0.3 | 13.8 |
| 7 | OVPip:OVCap 70:30 (batch 1) | 12.2 | 0.4 | 12.1 |
| 8 | OVPip:OVCap 70:30 (batch 2) | 12.1 | 0.3 | 12.0 |
| 9 | OVPip:OVCap 62:38 (batch 1) | 11.6 | 0.3 | 11.5 |
| 10 | OVPip:OVCap 62:38 (batch 2) | 13.0 | 0.6 | 12.8 |
| 11 | OVPip:OVCap 50:50 | 13.3 | 0.3 | 13.3 |
| 12 | POVCap-insoluble | not tested |
a
Average of 10 tests for PVlactams referenced.