Spectroscopic Study of Ethylene Vinyl Alcohol Copolymer and Poly (vinyl alcohol)

Abstract

The assignments of FTIR and Raman spectra of poly (vinyl alcohol) (PVOH) and four ethylene vinyl alcohol (EVOH) copolymers 72, 59, 44, and 32mole% of ethylene group, has been performed by in-situ measurements and deconvolution analysis. By comparing with the spectra of high-density polyethylene, the bands in the region of 1000_??_1200cm^-1 was classified into the C-C and C-O stretching vibrations. It was found that the C-C stretching vibration of PVOH and EVOH copolymers is affected significantly by disordered distribution of hydroxy group and crystallinity.