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Vibrational Dynamics and Heat Capacity of Syndiotactic Poly (vinyl alcohol) | ||
| Iranian Journal of Science | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 26 اسفند 1394 | ||
| نوع مقاله: Regular Paper | ||
| شناسه دیجیتال (DOI): 10.22099/ijsts.2016.3637 | ||
| نویسندگان | ||
| Parvej Ali* 1؛ Saiful Islam Ansari2؛ Seema Srivastava2؛ Irfan Ahmad Khan2 | ||
| 1Department of Chemistry, Integral University, Lucknow | ||
| 2Department of Physics, Integral University, Lucknow | ||
| چکیده | ||
| Poly (vinyl alcohol) (PVA) is a medically active polymer. A systematic study of normal modes of vibration and their dispersions in syndiotactic PVA (sPVA) has been reported by using Urey-Bradley force field (UBFF) and Wilson’s GF matrix method as modified by Higgs. It provides detailed interpretation of IR and Raman spectra. Characteristic feature of dispersion curves such as regions of high density–of–states, repulsion and character mixing of dispersion modes are discussed. Predictive values of heat capacity as a function of temperature between 0-500 K have been evaluated. | ||
| کلیدواژهها | ||
| Phonon dispersion؛ IR؛ Raman spectra؛ Density-of-states؛ Heat capacity | ||
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