INFLUENCE OF COMPLEX PLASTICIZERS CONTAINING GLYCEROL AND XYLITOL ON THE SOY PROTEIN PLASTIC CHARACTERISTICS

Influence of complex plasticizers containing glycerol and xylitol on the soy protein plastics characteristics was studied. The soy protein and complex plasticizers were mixed and hot press molded for making soy protein plastics. The results showed that the tensile strength, Young's modulus of soy protein plastics with complex plasticizers increased. The result revealed that there were two glass transition temperatures (Tg1 and Tg2), corresponding to complex plasticizer-rich and protein-rich domains. The differences of Tg2 and Tg1 with complex plasticizers decreased except the ratio 4:6 of glycerol and xylitol. Water absorption of modified plastics increased.