Study Physical Characteristics of Polyvinyl Alcohol/Carboxymethyl cellulose Blend Films

Abstract

The pure polyvinyl alcohol (PVA), pure CarboxyMethyl Celleluse (CMC), and CMC/PVA blend films with different amounts (0.1, 0.2, 0.25, 0.3 and 0.4gm) of both polymers were prepared by simple solution casting method in this study. FTIR and UV-Vis spectroscopies were used to characterize the physical properties of as- prepared samples. FTIR spectroscopy revealed that the original bonds for both PVA and CMC polymers are appearing in blend polymer but there is some bonds refer to CMC polymer seemed in high amount of this polymer. Optical characteristics showed that the absorbance and absorption coefficient of PVA polymer is improved with increase amounts of CMC polymer. Direct relationship between absorbance and absorption coefficient with amounts of CMC polymer will be establish. The transmittance and energy band gap of pure CMC polymer and pure PVA polymer films are decreased from 5.24 eV and 4.74 eV to 4.38 eV for blend polymer PVA 0.1g/CMC 0.4g film, respectively. From optical properties, it will be concluded that the blend film has highest absorbance and absorption coefficient and lowest transmittance in the UV energy and low value of energy band gap.