| Sample code | molar ratio for reactants | Stability time (min) |
| 0 | PVC/DOP without LDHs | 8.0 |
| 1 | Mg2+:Al3+:NH3∙H2O = 3:1:1 | 30.0 |
| 2 | Mg2+:Al3+:NH3∙H2O = 3:1:0.5 | 43.0 |
| 3 | Mg2+:Al3+:NH3∙H2O = 3:1:1.5 | 39.0 |
| 4 | Mg2+:Al3+:NH3∙H2O = 3:1:2 | 31.0 |
| 5 | Zn2+:Al3+ = 2:1 | 17.5 |
| 6 | Zn2+:Al3+: NH3∙H2O = 2:1:1 | 35.0 |
| 7 | Zn2+:Al3+: NH3∙H2O = 2:1:0.5 | 33.0 |
| 8 | Zn2+:Al3+: NH3∙H2O = 2:1:1.5 | 41.0 |
| 9 | Zn2+:Al3+: NH3∙H2O = 2:1:2 | 37.0 |