Pressure densified 1,3,5-tri(1-naphthyl)benzene glass. I. Volume recovery and physical aging
Abstract
The effects of pressure densification on 1,3,5-tri(1-naphthyl)benzene (TNB) are assessed from volumetric and calorimetric measurements. The pressure densified glass (PDG) has higher density than conventional glass (CG), but unlike ultrastable TNB glass prepared using vapor deposition which also has elevated density, TNB PDG exhibits higher enthalpy and lower thermal stability than when formed at ambient pressure. PDG also exhibits anomalous physical aging. Rather than evolving monotonically toward the equilibrium density, there is an overshoot to a lower density state. Only when the density of the PDG becomes equivalent to the corresponding CG does the density begin a slow approach toward equilibrium.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 11, 2019
- Source ID
- 10.1063/1.5122765
Entities
People
- Adam P. Holt
- C. Michael Roland
- Daniel Fragiadakis
Organizations
- Office of Naval Research
- United States Naval Research Laboratory