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Information Journal Paper

Title

SPECTROSCOPIC STUDIES, PHONON DISPERSION AND HEAT CAPACITY OF POLY (VINYLIDENE CHLORIDE)

Pages

  167-174

Keywords

POLY (VINYLIDENE CHLORIDE) 
IR 

Abstract

 Poly (vinylidene chloride) (PVDC) is a barrier polymer which has a wide scope in food packaging industries. A comprehensive study of the normal modes and their dispersion in PVDC using Wilson’s GF matrix method as modified by Higgs is reported. It provides a 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. HEAT CAPACITY has been calculated in the range 50–500 K via density-of-states using Debye relation. It is in fairly good agreement with the experimental data. HEAT CAPACITY behavior of PVDC with temperature was observed nearly linear in nature. HEAT CAPACITY provides a relationship between microscopic behavior and a macroscopic property. The thermal stability of a polymeric system and its interactive nature with other properties, such as phonon-phonon coupling is also related to thermodynamic behavior. The present study provides a theoretical framework to understand experimental measurements.

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