International Journal of Spectroscopy / 2011 / Article / Tab 1 / Research Article
Structural and Optical Investigations of Radiation Damage in Transparent PET Polymer Films Table 1 Our observed wavenumber values (in cm−1 ) at the FTIR absorption peaks for unirradiated (UI) and differently γ -irradiated PET samples. In the symbolic names like PET_135, the numbers in the names indicate γ -doses in kGy unit.
PET_UI PET30 PET50 PET70 PET_90 PET_100 PET_135 Suggested bond configuration 507 506 505 506 505 505 505 730 730 731 731 731 730 730 795 795 795 795 795 795 795 850 851 850 853 851 851 850 Trans config. γ -(CH2 ) 871 Phenyl γ (CH) 973 973 972 972 973 973 973 C–O–C antisymmetric 1024 1026 1025 1025 1024 1028 1097 1088 1087 1089 1085 1089 1086 1246 1219 1226 1125 1151 1220 1150 1246 cm−1 C=C stretch of phenyl ring 1303 1304 cm−1 CH2 wag 1328 1336 1349 1336 1368 C–C Alkane, =CH2 1390 1406 1410 1404 1407 1408 1392 1390 cm−1 C–C deviation 1465 1466 1466 1466 1467 1458 1467 1506 1505 1506 1505 1506 1506 1506 1578 1578 1578 1578 1578 1578 1578 1716 1712 1740 1708 1704 1721 1713 C=O stretch 1960 1960 1960 1960 1960 1960 1960 2109 2108 2109 2109 2109 2109 2108 2280 2264 2264 2263 2264 2263 2264 2378 2386 2379 2387 2383 2385 2385 2539 2540 2540 2542 2539 2540 2541 2906 2906 2906 2906 2906 2906 2906 2800 ~ 3000 cm−1 C–H stretch 2969 2969 2968 2969 2969 2969 2968 3059 3059 3059 3059 3059 3059 3059 3432 3431 3432 3432 3431 3432 3432 3000 ~ 3700 cm−1 OH stretch 3554 3553 3554 3555 3548 3553 3552 3629 3629 3629 3631 3629 3629 3629
