PREPARATION AND CHARACTERIZATION OF GUAR GUM BASED FILM

Abstract

A series of blends films of guar gum an edible carbohydrate polymer and poly (vinyl alcohol) with various functional aids are prepared by usual solution casting method and find the composition having better interaction. In this study the mechanical property of guar gum film are improved by using the biodegradable polymer such as poly (vinyl alcohol) and cross-linking agent borax. To improve % elongation citric acid was added. The film was characterized with the help of FTIR-ATR (Nicolet 380) and universal testing machine (Instron 3369). The FTIR results showed that no esterification took place between citric acid and guar gum during processing at 500C, so that the citric acid acted as a plasticizer, the tensile strength of the film get decreases as we increase the concentration of citric acid from (10% to 50% wt. bases of polymer) and elongation at break of films get increases, in our study of the effect of borax on GG-PVA blends with citric acid plasticizer and various borax combin...