Anisotropic frontal polymerization in a model resin–copper composite
Abstract
This work investigates experimentally and numerically frontal polymerization in a thermally anisotropic system with parallel copper strips embedded in 1,6-hexanediol diacrylate resin. Both experiments and multiphysics finite element analyses reveal that the front propagation in the thermally anisotropic system is orientation-dependent, leading to variations in the front shape and the front velocity due to the different front–metal strip interaction mechanisms along and across the metal strips. The parameters entering the cure kinetics model used in this work are chosen to capture the key characteristics of the polymerization front, i.e., the front temperature and velocity. Numerical parametric analyses demonstrate that the front velocity in the directions parallel and perpendicular to the metal strips increases as the system size decreases and approaches the analytical prediction for homogenized systems. A two-dimensional homogenized model for anisotropic frontal polymerization in the metal–resin system is proposed.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 01, 2022
- Source ID
- 10.1063/5.0077552
Entities
People
- Imogen Hoffman
- Jin-Young Kim
- John A Pojman
- Philippe H Geubelle
- Sagar Vyas
- Sarah Li
- Yuan Gao
Organizations
- Air Force Office of Scientific Research
- Louisiana State University
- National Science Board
- University of Illinois Urbana–Champaign