Effect of Stearic Acid on the Properties of Soy Protein Plastic

The sensibility to water was the unfavourable factor for the degradable plastics with soy protein to be used extensively.In order to solve the problem,the proportion of glycerol and soy protein was set and soy protein was blended with stearic acid.The effect of stearic acid addition on the mechanical properties and water absorbing properties was investigated.The stretching,FT-IR and SEM tests showed that both the glycerol and stearic acid had effects on the mechanical properties,water absorbing property and section configuration of the films.