Soy protein isolate (SPI) films were formed by cross linking with resorcinol. The resorcinol content was varied and its effect on mechanical properties was measured. The variation of tensile creep modulus with time for different loadings of resorcinol indicated a higher value when the resorcinol content was 10 and 20% of the weight of SPI. The addition of 20% resorcinol led to an overall increase in the tensile strength from 4.9 to 24.7 MPa and modulus increases from 801 to 1358 MPa than SPI films. The percent elongation was also increased from 3.2 to 8.4 when compared to unmodified SPI film. The impact strength was at a maximum and moisture content at a minimum for 20% resorcinol content.
Zhang, J., Mungara, P. and Jane, J. ( 2001). Mechanical and Thermal Properties of Extruded Soy Protein sheets, J. Polymer., 42(6): 2569-2578.
2.
Liang, F., Wang, Y.Q. and Sun, X.S. ( 1999). Curing Processes and Mechanical Properties of Protein Based Polymers, J. Polym. Eng., 19(6): 383-394.
3.
Shiti, J., Chabba, S. and Netravali, A.N. ( 2005). Characterization of Flax Fabric and Glutaraldehyde Modified Soy Protein Concentrate Composites, J. Mater. Sci., 40(23): 6263-6273.
4.
Chabba, S. and Netravali, A.N. ( 2005). Green’ Composites Part 2: Characterization of Flax Yarn and Glutaraldehyde/Poly(Vinyl Alcohol) Modified Soy Protein Concentrate Composites, J. Mater. Sci., 40(23): 6275-6282.
5.
Lodha, P. and Netravali, A.N. ( 2005). Thermal and Mechanical Properties of Environment-Friendly Green Plastics from Stearic Acid Modified-Soy Protein Isolate, Ind. Crops Prod., 21(1): 49-64.
6.
Kim, K.M. , Hwang, K.T., Weller, C.L. and Hanna, M.A. (2002). Preparation and Characterizations of Soy Protein Isolate Films Modified with Sorghum Wax, J. Am. Oil Chem. Soc., 79(6): 615-619.
7.
Wang, S., Sue, H. and Jane, J. ( 1996). Effects of Polyhydric Alcohols on the Mechanical Properties of Soy Protein Plastics, J. Macromol. Sci - Chem. A, 33(5): 557-569.
8.
Schwant, N.W. and Ground, T.G. (2003). Resorcinol Formaldehyde Resin ‘‘Russian Red’’ Endodontic Therapy, J. Endo., 29(7): 435-437.
9.
Wu, Z., Zhang, Z. and Zhang, M. ( 1996). Synthesis of a New Organic Aerogel, ChineseJ. Polym. Sci., 14(2): 127-133.
