Table 1. Band Assignments for the Neat Microcapsulesa.
| wavenumber (cm–1) | intensity | band assignment | molecular structure | material | refs |
|---|---|---|---|---|---|
| 1653 | vw, shoulder | δ(N–H) | N–H | melamine–formaldehyde | (72) |
| 1548 | s, broad | ν | triazine ring | melamine–formaldehyde | (73) |
| 1500 | s, broad | δ(C–H) | C–H, in CH2, CH2–OH, CH2–O– | melamine–formaldehyde | (71, 74) |
| 1470 | vs | asymmetric, δ(C–H) | CH2 | paraffin | (72) |
| 1455 | s, broad | δ(C–H) | C–H, in CH2, CH2–OH, CH2–O– | melamine–formaldehyde | (71, 73, 74) |
| 1367 | w | symmetric, δ(C–H), | C–H, in CH2, CH2–OH, CH2–O–CH2, bridge | melamine–formaldehyde | (72) |
| 1341 | s, broad | ν(C–N) | aromatic C–N | melamine–formaldehyde | (73) |
| 1156 | s, broad | ν(C–N) | C–N/–CH2–O– | melamine–formaldehyde | (73) |
| 1070 | vw | symmetric, ν(C–O) | –CH2–O–CH2–, ether | melamine–formaldehyde | (73) |
| 891 | m | twisting | C–H in CH2 | paraffin | (72) |
| 813 | s | δ | triazine ring | melamine–formaldehyde | (73) |
| 755 | w | δ | N–H, in amines, triazine ring | melamine–formaldehyde | (73) |
| 716 | vs | δ, in-plane rocking | C–H in CH2 | paraffin | (72) |
a
Abbreviations for band intensities. vw: very weak; w: weak; m: medium; s: strong; and vs: very strong.