Effect of Additives on Esterified Starch Film's Mechanical Properties

Effects of glycerol,PVA,glass fiber and coupling agent on esterified starch film's mechanical properties were studied.By increasing glycerol,the breaking elongation of esterified starch film increased and the tensile strength decreased.The film's max tensile strength was 25 MPa when the amount of glycerol and glass fiber were 3 %,7 %(Vs dosage of starch) and it's breaking elongation ratio was low.Film's tensile strength and breaking elongation were both increased by enhancing amount of PVA.The results showed that esterified starch film's mechanical properties could reach application requirement when PVA was 30 %,glycerol was 10 %,coupling agent was 3 %,glass fiber was 7 %.