Table 5. Cyclic Poly(tetramethylene ether) Glycol Adipate, CO–C4H8–CO–O–(C4H8O)y, Identified in LC–MS Positive Mode.
| RT (Minute) | Measured Mass (M+H)+/(M+Na)+ | Repeating Unit (y) | Molecular Formula |
|---|---|---|---|
| 10.21 | 345.2279/367.2094 | 3 | C18H32O6 |
| 11.08 | 417.2855/439.2670 | 4 | C22H40O7 |
| 11.73 | 489.3427/511.3246 | 5 | C26H48O8 |
| 12.31 | 561.4005/583.3823 | 6 | C30H56O9 |
| 12.70 | 633.4577/655.4396 | 7 | C34H64O10 |
| 13.05 | 705.5425/727.4974 | 8 | C38H72O11 |
| 13.36 | 777.5724/799.5538 | 9 | C42H80O12 |
| 13.71 | 849.6302/871.6117 | 10 | C46H88O13 |
| 14.13 | 921.6879/943.6691 | 11 | C50H96O14 |
| 14.63 | 993.7461/1015.7274 | 12 | C54H104O15 |
| 15.19 | 1065.8042/1087.7858 | 13 | C58H112O16 |
| 15.90 | 1137.8596/1159.8434 | 14 | C62H120O17 |
| 16.61 | 1209.9158/1231.9009 | 15 | C66H128O18 |