TY - JOUR ID - 3637 TI - Vibrational Dynamics and Heat Capacity of Syndiotactic Poly (vinyl alcohol) JO - Iranian Journal of Science JA - ISTT LA - en SN - 2731-8095 AU - Ali, Parvej AU - Ansari, Saiful Islam AU - Srivastava, Seema AU - Khan, Irfan Ahmad AD - Department of Chemistry, Integral University, Lucknow AD - Department of Physics, Integral University, Lucknow Y1 - 2016 PY - 2016 VL - IS - SP - EP - KW - Phonon dispersion KW - IR KW - Raman spectra KW - Density-of-states KW - Heat capacity DO - 10.22099/ijsts.2016.3637 N2 - 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. UR - https://ijsts.shirazu.ac.ir/article_3637.html L1 - ER -