Development and Characterization of Allyl Soyate and Defatted Soy Meal Based Plastics
Epoxidized allyl ester of soybean oil (EAS) promises to be a versatile epoxy resin. The resin in combination with soy protein isolate (SPI) or soy flour (SF) yields plastics with good mechanical properties; plastics with varied properties can be obtained with changes in formulations. Mechanical, thermal properties and environmental stability of EAS-SPI and EAS-SF plastics obtained through variations in formulations and curing techniques were examined. The test results showed that modulus and strength of the plastics were dependent on formulation, and plastics with varying properties were readily fabricated. Properties of the plastics were compared with those of other soy based plastics such as the SPI-glycerol plastics. EAS derived plastics were found to possess vastly superior mechanical properties than SPI-glycerol based plastics. Accelerated aging tests showed that the EAS derived plastics were more resistant to degradation or deformation and were not susceptible to fungal growth. Unlike SPI-glycerol plastics which exhibited a sharp decrease in mechanical properties, the EAS based plastics retained their mechanical properties after accelerated aging. The results showed that EAS-SPI and EAS-SF formulations can yield flexible materials or rigid strength plastics, which can be used for a variety of applications.
R. Seemamahannop et al., "Development and Characterization of Allyl Soyate and Defatted Soy Meal Based Plastics," Proceedings of the 2007 International SAMPE Symposium and Exhibition, Society for the Advancement of Material and Process Engineering (SAMPE), Jan 2007.
Mechanical and Aerospace Engineering
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Article - Conference proceedings
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