Modify of Thermoplastic Soy Protein Isolated by Methyl Methacrylate

Thermoplastic soy protein isolated (T-SPI) was synthesized by graft copolymerization of methyl methacrylate (MMA) onto soy protein isolated (SPI). T-SPI and SPI were characterized by means of FTIR, DSC, TG and so on. The results showed that the monomers were grafted onto the SPI successfully. Compared with SPI, T-SPI improved its thermal stability markedly, and appeared a glass transition at 124°C. The introduced monomers could make the rigidity decreased obviously, which made the materials more flexible and fluid in processing from the result of Torque rheometer. In a word, the T-SPI was a good thermoplastic and stability material.