| About this Abstract |
| Meeting |
Materials Science & Technology 2011
|
| Symposium
|
Recent Advances in Structural Characterization of Materials
|
| Presentation Title |
Concurrent Raman and Brillouin Scattering for Monitoring Polymer Network Assembly |
| Author(s) |
Michael F. Aldridge, John Kieffer |
| On-Site Speaker (Planned) |
Michael F. Aldridge |
| Abstract Scope |
Raman spectroscopy is commonly used to measure chemical and structural changes in reacting molecular systems. This technique probes the bonding characteristics and symmetries of molecular units. Changes in the Raman spectra primarily reveal the relative concentrations of reacted vs. unreacted polymer building blocks, as a function of time. However, they tell little about the topological characteristics of the growing polymer network. Brillouin scattering, on the other hand, allows us to measure the complex mechanical modulus of the network at the molecular level. Real and imaginary parts provide a measure of structural integrity of the network and of the energy dissipated by mobile structural moieties, respectively. In-situ concurrent Brillouin and Raman measurements, taken from the same sample volume during the cure of thermosets, allow us to construct detailed structural models of these materials. We will illustrate the capabilities of this approach based on the examples of dicyclopentadiene and epoxy. |
| Proceedings Inclusion? |
Definite: A CD-only volume |