Research Article
Preparation and Characterization of HPMC/PVP Blend Films Plasticized with Sorbitol
Table 2
Spectroscopically measured wavenumbers of HPMC/PVP polymer blend films plasticized with Sorbitol.
| 5% HPMC + 2% PVP (S) wave no. (cm−1) | S + 0.2 g Sorbitol wave no. (cm−1) | S + 0.4 g Sorbitol wave no. (cm−1) | S + 0.6 g Sorbitol wave no. (cm−1) | S + 0.8 g Sorbitol wave no. (cm−1) | Correlation |
| 3361.50 | 3358 | 3326 | 3335 | 3305.5 | O–H stretch | 2911 | 2908.50 | 2921.50 | 2911.50 | 2910.0 | C–H stretch | 2127.23 | 2126.61 | 2126.96 | 2130.15 | 2127.27 | C=N stretch | 1657.50 | 1656 | 1654 | 1651.50 | 1651 | –C=C stretch | 1495.30 | 1495.6 | 1495.52 | 1495.85 | 1494.50 | –C–C stretch | 1443.50 | 1440.0 | 1444.50 | — | — | –C–H bend | 1374.50 | 1324 | 1375.50 | 1363 | — | –C–H rock | 1299.0 | — | 1299.50 | — | 1230 | –C–H wag(methyl) | 1108.50 | 1114.0 | 1107.50 | 1117.50 | — | –C–N stretch |
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