Dr. Chung-Hao Lee
Describe your undergraduate research or creative project:
The objective of this study is to investigate the use of a novel aliphatic urethane based shape memory polymer (SMP) in the endovascular embolization of intracranial aneurysms. We hypothesized that a decrease in the catalyst ratio in the SMP would increase the ductility and lower the glass transition temperature (Tg) of the material. To test this hypothesis, we synthesized polymers using eleven monomer ratios and analyzed their respective mechanical properties and shape memory behavior. Using temperature-controlled tensile failure, cyclic testing, and other characterization techniques, we have determined their failure stress & strain, glass transition temperature, shape fixability, and the shape recovery rate. Our results showed that SMPs with a smaller concentration of catalyst showed a glass transition temperature approaching body temperature and a larger failure strain. Such ductility and low Tg allow for embolic device design that can handle large, complex deformation while...
Awards and/or presentations:
Kunkel, Robert. "Synthesis and Characterization of Aliphatic Urethane Shape Memory Polymers for Treatment of Intracranial Aneurysms." Curiosity to Creativity Spring Symposium, 25 April 2018, Oklahoma Memorial Union, Norman, OK