The Eff ect of Pregelatinized Starch on the Properties of Poly (Vinyl Alcohol) Film for the Water-Soluble Laundry Bag

The goal of this study was to develop pregelatinized starch (P-St) and polyvinyl alcohol (PVOH) fi lms as water-soluble laundry plastic bags avoid having contact with COVID-19 infected clothes by extrusion method. effects content on the properties were examined. PVOH P-St blend compounded twin- screw extruder various 0, 10, 20, 30, 40% weight xed glycerol 20 phr. produced blown lm extrusion. chemical structure, thermal properties, water-solubility, mechanical cross-sections morphological PVOH/G/P-St characterized. As a result, formation intermolecular interactions between PVOH, confi rmed FTIR. Moreover, addition could reduce stability due amylose, substance amorphous affecting chains fl exibility PVOH/G/P-St. From differential scanning calorimeter glass transition temperature increased increment because entanglement had affected reduction in crystallinity led decrement melting temperature. Furthermore, water solubility would strongly be dependent percentage gelatinized (%GS). decreased GS increased. In addition, 20% possessed highest value tensile strength modulus, particles have good distribution PVOH/G indicating stronger interaction PVOH/G.