| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Preceramic Polymers; Synthesis, Processing, Modeling, and Derived Ceramics
|
| Presentation Title |
Thermal and Rheological Properties of Preceramic Polymer Grafted Nanoparticles |
| Author(s) |
Kara L. Martin, Ravichandran H Kollarigowda, Caitlyn Clarkson, Christina M Thompson, Subramanian Ramakrishnan, Matthew B Dickerson |
| On-Site Speaker (Planned) |
Kara L. Martin |
| Abstract Scope |
Ceramic matrix composites (CMC) offer unique material properties, including extreme temperature stability, making them advantageous for use in aerospace research. CMCs can be fabricated through polymer infiltration and pyrolysis (PIP), which requires repetition for full part densification due to porosity formed from polymer thermolysis. Addition of inorganic fillers can offset porosity but the dispersion rheology can be poor due to particle aggregation. Grafting polymers to fillers is a dependable method for stabilizing polymer/particle mixtures, but is an unexplored area for preceramic polymers. In this presentation, we detail our method of hydrosilylation grafting-from used to graft polycarbosilane brushes on silica. We demonstrate how changing the brush composition can impact rheological and thermal behaviors of the grafted particle, as well as the ceramic composite. The goal of this research is to design new preceramic materials that maintain advantageous rheological properties for common processing methods like PIP. |