Table 2 Main ATR-FTIR absorption bands
Polymer | Main IR absorption bands (cm-1) |
|---|---|
Polystyrene (HS 36, 38, 405, 409 & 446) | 3025 (C-H) stretch |
2921 & 2854 (CH2) asymmetric & symmetric stretch | |
1602 ring stretch | |
1449 (C = C) ring | |
905 (C = CH) | |
745 & 696 (C-H) bend of aromatic ring | |
Cellulose acetate (HS 91, 474, 475, 476 & 477) | 2977 & 2932 (CH3) asymmetric & symmetric stretch |
2951 & 2880 (CH2) asymmetric & symmetric stretch | |
1740 (C = O) | |
1367 (CH3) bend | |
1032 (C-O) stretch | |
Cellulose nitrate (HS 248, 270 & 271) | 2925 & 2854 (CH2) asymmetric & symmetric stretch |
1721 (C = O) | |
1647 & 1274 (NO2) asymmetric & symmetric stretch | |
1155 asymmetric ring stretch | |
1065 (C-O) stretch | |
830 (N-O) stretch | |
749 (N-O) bend | |
Polycarbonate (HS 52, 143, 413, 466 & 467) | 2969 & 2869 (CH3) asymmetric & symmetric stretch |
2925 & 2854 (CH2) asymmetric & symmetric stretch | |
1770 (C = O) | |
1594 & 1605 doublet, aromatic ring stretch | |
1081, 1015 & 830 (1,4 disubstituted aromatic ring) | |
Rubber (HS 103, 268 & 269) | 3350broad (OH) suggests degradation |
2943 & 2854 (CH3) asymmetric stretch & symmetric stretch | |
2917 (CH2) asymmetric stretch | |
1714 (C = O) suggests degradation | |
1620 (C = C) stretch | |
1442 & 1375 (CH3) asymmetric & symmetric bend | |
1069weaksuggests degradation | |
Poly(vinyl chloride) (HS 62, 415, 424, 430 & 468) | 2925 (CH2) stretch |
2861shoulder (C-H) stretch (phthalate plasticiser) | |
1720 (C = O) (phthalate plasticiser) | |
1579 and 1602 doublet (phthalate plasticiser) | |
1427 (CH2) bend | |
1255 (C-H) bend, in phase | |
961(C-C) stretch | |
693 (C-Cl) stretch | |
Polyurethane (HS 69, 86, 458, 461 & 464) | 3325 (N-H) stretch |
2973 (C-H) stretch, asymmetric | |
2865 (C-H) stretch, symmetric | |
1725 (C = O) stretch | |
1639 (OCONH) | |
1538 (N-H) deformation | |
1088 (OCONH) in plane | |
Polypropylene (HS 77, 400, 403, 416 & 444) | 2947 & 2869 (CH3) asymmetric & symmetric stretch |
2921 & 2839 (CH2) asymmetric & symmetric stretch | |
1453 & 1378 (CH3) asymmetric & symmetric bend | |
1438 (CH2) bend | |
1166 & 996 indicative of isotactic form | |
Polyethylene (HS 80, 404, 417, 459 & 463) | 2917 & 2854 (CH2) asymmetric & symmetric stretch |
1470 (CH2) bend | |
1378 (CH3) symmetric bend (low density only) | |
719 (CH2) rocking |