Orthogonal experiments for preparation of LMPA.
| Factors | Reaction time/h | Reaction temperature/°C | Ratio of raw materials |
|---|---|---|---|
| Level 1 | 1.5 | 160 | 2 |
| Level 2 | 2 | 180 | 2.5 |
| Level 3 | 2.5 | 200 | 3 |
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