Biopolymers & Biocomposites Workshop - August 14, 2012

Thermal-Mechanical Properties of Tung-Oil Based Thermosetting Biopolymers

P. R. Hondred, Leo Salat, Josh Heyer, and M. R. Kessler
Iowa State University

Several biorenewable thermosetting polymers have been successfully prepared from Tung oil through cationic polymerization. The Tung oil triglyceride was blended with its methyl ester, produced through saponification followed by esterification. The changes in storage modulus, loss modulus, and glass transition temperature as a function of the methyl ester blend were measured through dynamic mechanical analysis. Additionally, the fraction of cross-linked material in the polymer is calculated through Soxhlet extraction, while proton nuclear magnetic resonance and Fourier transform infrared spectroscopy was used to investigate the structure of the copolymer networks. Finally, the thermal stability of the thermosets as a function of its methyl ester blend was determined through thermogravimetric analysis.