Effects of Processing Temperature and Lignin on Properties of Starch/PVA/Lignin Film Prepared by Melt Compounding

Abstract

Starch/PVA/lignin blends with gliserol as plasticizer were the prepared by melt compounding method using an internal mixer for compounding and compression molding for film forming. The lignin concentration and compounding temperature were varied at two level. Starch/PVA/lignin film produced was analyzed for mechanical properties (tensile strength, elongation at break, and tear resistance), thermal property with Thermogravimetric analysis (TGA), and morphology with scanning electron microscope (SEM). The results indicate that interaction of processing temperature and lignin concentration has significant effect on mechanical properties. The presence of lignin in starch/PVA blend improves thermal properties. Morphologically, higher lignin concentration causes lignin to agglomerate.