Table 4. List of Poly(tetramethylene ether) Glycols, HO(C4H8O)yH, Identified.
| RT (Minute) | Measured Mass (M+H)+/(M+Na)+ | Repeating Unit (y) | Molecular Formula |
|---|---|---|---|
| 8.48 | 307.2481/329.2300 | 4 | C16H34O5 |
| 9.51 | 379.3060/401.2879 | 5 | C20H42O6 |
| 10.31 | 451.3633/473.3451 | 6 | C24H50O7 |
| 10.92 | 523.4209/545.4028 | 7 | C28H58O8 |
| 11.40 | 595.4786/617.4604 | 8 | C32H66O9 |
| 11.82 | 667.5358/689.5178 | 9 | C36H74O10 |
| 12.19 | 739.5936/761.5752 | 10 | C40H82O11 |
| 12.52 | 811.6505/833.6321 | 11 | C44H90O12 |
| 12.79 | 883.7081/905.6896 | 12 | C48H98O13 |
| 13.02 | 955.7656/977.7471 | 13 | C52H106O14 |
| 13.25 | 1027.8242/1049.8063 | 14 | C56H114O15 |
| 13.49 | 1099.8816/1121.8628 | 15 | C60H122O16 |
| 13.74 | 1171.9395/1193.9210 | 16 | C64H130O17 |
| 14.03 | 1243.9979/1265.9788 | 17 | C68H138O18 |
| 14.39 | 1316.0544/1338.0364 | 18 | C72H146O19 |
| 14.83 | 1388.1071/1410.0944 | 19 | C76H154O20 |
| 15.29 | 1460.1650/1482.1517 | 20 | C80H162O21 |