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Sample | Sample description | Proc. | NMR analysisa | FT-IR analysis | Mn | Mw | DP |
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R | TOFA | None | Oleic and linoleic fatty acids | Fatty acid | 281b | 281b | 1 |
A1 | TOFA : iron : water~1 : 0.5 : 0.01 (CO2 present) | A | Oleic (st), linoleic (md), carboxylate (vw) | Fatty acid, acid carboxylate | 280 | 1320 | 4.8 |
A2 | TOFA : iron : water~1 : 0.8 : 0.01 (CO2 present) | A | Oleic (st), linoleic (md), carboxylate (0), peaks broadened | Fatty acid, acid carboxylate | 450 | 1250 | 2.8 |
A3 | TOFA : iron : water~1 : 1 : 0.01 (more CO2 present) | A | Oleic (wk), linoleic (vw), carboxylate (0), peaks broadened even more | Fatty acid, acid carboxylate, metal-carboxylate complex | 1090 | 1580 | 1.4 |
B1 | TOFA : iron : carbonated water~1 : 0.5 : 0.015 | B | Oleic (st), linoleic (md), carboxylate (0), peaks slightly broadened | Fatty acid, acid carboxylate, metal-O bonding | 284 | 914 | 3.2 |
B2 | TOFA : iron : carbonated water~1 : 0.5 : 0.025 | B | Oleic (st), linoleic (md), carboxylate (vw), peaks broadened | Fatty acid, trace carboxylate, metal-O bonding | 875 | 1100 | 1.3 |
B3 | TOFA : iron : carbonated water~1 : 0.5 : 0.025 (CO2 also bubbled into a mixture) | B | Oleic (st), linoleic (md), carboxylate (w), peaks broadened | Fatty acid, trace carboxylate, metal-O bonding | 340 | 1870 | 5.6 |
C1 | Linoleic acid : iron : water~1 : 0.5 : 0.01 (CO2 and air present) | A | Finoleic (st), carboxylate (st), some conjugations present due to oxidation | Fatty acid, some metal-carboxylate complexes | 1400 | 2420 | 1.8 |
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