Table 4.
The types and amounts of aromatic structural units.
| Samples | a | b | c | d | e | f | g |
|---|---|---|---|---|---|---|---|
| YL | 1 | 2 | 3 | 0 | 0 | 0 | 0 |
| SL | 1 | 2 | 3 | 0 | 6 | 0 | 0 |
| LNC | 7 | 0 | 3 | 2 | 4 | 1 | 2 |
| QN | 12 | 0 | 3 | 1 | 2 | 0 | 2 |
| ST | 9 | 0 | 3 | 2 | 2 | 0 | 3 |
| FGZ | 6 | 0 | 5 | 2 | 3 | 1 | 4 |
| LJT | 3 | 1 | 11 | 1 | 0 | 0 | 0 |
| XDW | 2 | 1 | 2 | 4 | 7 | 0 | 7 |
| XJ | 2 | 0 | 4 | 2 | 8 | 1 | 7 |
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