Research Article
Ethylene-Vinyl Acetate Copolymer/Crude Gossypol Compositions as Pour Point Depressants for Waxy Oil
Table 2
Assignments of proton resonances in the EVAc/CG (65 : 35 wt%) composition.
| Peak number | ppm | Assignments of 1H resonances | Crude gossypol | EVA copolymer |
| 1 | 1.19 (quint) | | –CH2–CH2–CH2– | 2 | 1.41 (q) | | –CH–OCOCH3–CH2–CH2– | 3 | 1.55 (d) | (CH3)2C | | 4 | 1.76 (t) | | –CH–OCOCH3–CH2–OCOCH3– | 5 | 1.93 (s) | | –OCOCH3– | 6 | 2.16 (s) | CH3 | | 7 | 3.90 (sept) | H–C(CH3)2 | | 8 | 4.46 (s) | | | 9 | 5.24 (quint) | | –CHOCOCH3– | 10 | 5.73 (s) | H–O1 | | 11 | 6.46 (s) | H–O6 | | 12 | 7.79 (s) | H–C4 | | 13 | 11.13 (s) | CHO | | 14 | 15.19 (s) | H–O7 | |
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