About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Molecular Approaches to Ceramics; Synthesis, Processing, Modeling, and Derived Ceramics
|
| Presentation Title |
The Influence of Residual Copper Catalyst on the Polymer-to-Ceramic Conversion of a Click-Derived Polycarbosilane |
| Author(s) |
Timothy Pruyn, James Ponder, Matthew Dickerson, Nicholas Bedford |
| On-Site Speaker (Planned) |
Timothy Pruyn |
| Abstract Scope |
Preceramic polymers (PCPs) are a key class of materials for the preparation of advanced ceramic components. Many basic scientific questions remain regarding the structural transformation of the polymer to the final ceramic and how processing variables affect PDC materials properties. In this study, PCPs were prepared using a mild and scalable copper (Cu) catalyzed azide/alkyne “click” reaction to yield PDCs. Unexpectedly, it was found that the removal of residual Cu catalyst from a model click-derived polycarbosilane PCP significantly reduced the ceramic yield during pyrolysis. Herein, we report the influence of Cu impurities on polycarbosilane-derived SiC ceramics and present a mechanistic understanding of the unintended role of Cu in the polymer-to-ceramic conversion process. This presentation will discuss synchrotron-based scattering and spectroscopy methods that to track the evolution of different atomic species and local structures as well as the influence of Cu toward atomic-scale structures in the final ceramics. |