Measuring the structure and equation of state of polyethylene terephthalate at megabar pressures.
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
18 Jun 2021
18 Jun 2021
Historique:
received:
11
01
2021
accepted:
25
05
2021
entrez:
19
6
2021
pubmed:
20
6
2021
medline:
20
6
2021
Statut:
epublish
Résumé
We present structure and equation of state (EOS) measurements of biaxially orientated polyethylene terephthalate (PET, [Formula: see text], also called mylar) shock-compressed to ([Formula: see text]) GPa and ([Formula: see text]) K using in situ X-ray diffraction, Doppler velocimetry, and optical pyrometry. Comparing to density functional theory molecular dynamics (DFT-MD) simulations, we find a highly correlated liquid at conditions differing from predictions by some equations of state tables, which underlines the influence of complex chemical interactions in this regime. EOS calculations from ab initio DFT-MD simulations and shock Hugoniot measurements of density, pressure and temperature confirm the discrepancy to these tables and present an experimentally benchmarked correction to the description of PET as an exemplary material to represent the mixture of light elements at planetary interior conditions.
Identifiants
pubmed: 34145307
doi: 10.1038/s41598-021-91769-0
pii: 10.1038/s41598-021-91769-0
pmc: PMC8213800
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
12883Subventions
Organisme : U.S. Department of Energy
ID : DE-AC02-76SF00515
Organisme : Helmholtz Association
ID : VH-NG-1141
Organisme : Fusion Energy Sciences
ID : FWP-100182
Organisme : Laboratory Directed Research and Development
ID : 18-ERD-033
Organisme : U.S. Department of Energy, National Nuclear Security Administration
ID : DE-NA0003842
Organisme : U.S. Department of Energy, Office of Science, Office of Fusion Energy
ID : DE-SC0018298
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