Paper Number
TM3
Session
Rheometry: Advanced Techniques and Methods
Title
Simultaneous Raman and rheology measurements for reaction and stress monitoring
Presentation Date and Time
October 21, 2019 (Monday) 10:40
Track / Room
Track 1 / Room 305A
Authors
- Roberts, Christine (Sandia National Laboratories, Diagnostic Science & Engineering)
- Maes, Ashley M. (Sandia National Laboratories)
- Grillet, Anne M. (Sandia National Laboratories, Engineering Sciences Division)
- Rao, Rekha R. (Sandia National Laboratories, Fluid and Reactive Processes)
Author and Affiliation Lines
Christine Roberts, Ashley M. Maes, Anne M. Grillet, and Rekha R. Rao
Engineering Sciences Division, Sandia National Laboratories, Albuquerque, NM 87185-0346
Speaker / Presenter
Roberts, Christine
Text of Abstract
Monitoring the rheology, polymerization, and stress generation of polymeric systems is essential for properly understanding polymeric encapsulation processes for electronics components and other phase-changing systems. Using simultaneous Raman spectroscopy and rheological measurements, the evolving rheology of complex fluids can be linked to chemical or conformational changes that occur during processing such as melting, crystallization, curing, or gelation. Simultaneous measurements streamline the creation of material models that link the extent of reaction of curing polymer systems to the viscosity of the material. Here, we will discuss examples of our research including monitoring the crystallinity and modulus of ethylene vinyl acetate for photovoltaic photovoltaic module encapsulants, measuring curing kinetics of EPON 828 epoxy using Jeffamine, and solidification of paraffin wax which is used as a phase change material in thermal energy storage devices. We will also discuss efforts to measure stress in materials using Raman spectroscopy using carbon nanotube tracer materials. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA-0003525.