CHED 705 |
| Two components of a free-radical front polymerization system, cumene hydroperoxide (CHP) (initiator) and 1,6-hexanediol diacrylate (HDDA) (monomer), were microencapsulated through formation of a polyurea shell via interfacial polymerization of a multifunctional amine and a multifunctional isocyanate. These CHP-core microcapsules were then tested at different concentrations in polymeric systems to determine the minimum amount of microencapsulated initiator needed to begin frontal polymerization of encapsulated HDDA. The systems, containing varying concentrations of microencapsulated CHP, were run in small vials and front velocities were measured for the reactions. Investigations into the mechanical properties of the polymers formed and into the pot lives of these polymerization systems were made as well. It was found that slight inhomogeneities in microcapsule dispersion, as well as varying core-loading percentages, had a great impact on the frontal velocities of these systems. |
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Undergraduate Research Poster Session: Polymer Chemistry
11:00 AM-1:00 PM, Monday, April 7, 2008 Morial Convention Center -- Hall A, Poster
Division of Chemical Education |