Degree Type


Date of Award


Degree Name

Doctor of Philosophy


Materials Science and Engineering

First Advisor

Michael R. Kessler


Vegetable oils have been utilized in developing various types of bio-based materials in my research work.

Bio-based polyhydroxy fatty acids have been subject to ring-opening epoxidized soybean oil with alkaline catalyst DBU to generate polyols with varying OH numbers. Polyurethane films were obtained using these polyols polymerized with isophrone diisocyanates. The polyhydroxy fatty acids were also used as internal emulsifiers in anionic polyurethane dispersion synthesis due to the presence of carboxylic acid groups in their structures. In addition, acrylated epoxidized soybean oil was involved in another project. 2-methyl aziridine was added to acrylic groups via Michael addition mechanism under mild conditions. The resulting aziridine-containing compound could be polymerized with bio-based polyacids rapidly at room temperature. Plus, thermal polymerization of soybean oil has been studied. The heat-bodied soybean oils were subject to ozonolysis followed by reduction in order to produce polyols with primary hydroxyls, which are relatively reactive.

The principle of the research is to develop products with considerably high bio-content. The soaring price of petroleum has become a global issue so that industry and academia have been seeking bio-renewable substitutions which can be potentially converted to versatile products that have comparable properties to petroleum-based merchandise.


Copyright Owner

Ruqi Chen



File Format


File Size

128 pages