6533b839fe1ef96bd12a67b0
RESEARCH PRODUCT
Effect of physical aging on the low-frequency vibrational density of states of a glassy polymer
Lucien SaviotS. EtienneEugène DuvalL. DavidJ. F. Jalsubject
chemistry.chemical_classificationMaterials sciencePhysical agingAnnealing (metallurgy)FOS: Physical sciencesGeneral Physics and AstronomyThermodynamicsDisordered Systems and Neural Networks (cond-mat.dis-nn)PolymerCondensed Matter - Disordered Systems and Neural NetworksLow frequency01 natural sciencesLower temperatureInelastic neutron scattering010305 fluids & plasmaschemistry.chemical_compoundVibrational density of stateschemistry0103 physical sciences[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Methyl methacrylate010306 general physicsdescription
The effects of the physical aging on the vibrational density of states (VDOS) of a polymeric glass is studied. The VDOS of a poly(methyl methacrylate) glass at low-energy (<15 meV), was determined from inelastic neutron scattering at low-temperature for two different physical thermodynamical states. One sample was annealed during a long time at temperature lower than Tg, and another was quenched from a temperature higher than Tg. It was found that the VDOS around the boson peak, relatively to the one at higher energy, decreases with the annealing at lower temperature than Tg, i.e., with the physical aging.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-09-01 | Europhysics Letters (EPL) |