Measuring the structure and equation of state of polyethylene terephthalate at megabar pressures - Sorbonne Université Access content directly
Journal Articles Scientific Reports Year : 2021

Measuring the structure and equation of state of polyethylene terephthalate at megabar pressures

J. Vorberger
N. J Hartley
A. K Schuster
S. Brown
T. Döppner
L. B Fletcher
D. O Gericke
P. Sun
D. Kraus

Abstract

We present structure and equation of state (EOS) measurements of biaxially orientated polyethylene terephthalate (PET, $$({\hbox {C}}_{10} {\hbox {H}}_8 {\hbox {O}}_4)_n$$ ( C 10 H 8 O 4 ) n , also called mylar) shock-compressed to ( $$155 \pm 20$$ 155 ± 20 ) GPa and ( $$6000 \pm 1000$$ 6000 ± 1000 ) 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.
Fichier principal
Vignette du fichier
s41598-021-91769-0.pdf (2.07 Mo) Télécharger le fichier
Origin : Publication funded by an institution

Dates and versions

hal-03266753 , version 1 (22-06-2021)

Identifiers

Cite

J. Lütgert, J. Vorberger, N. J Hartley, K. Voigt, M. Rödel, et al.. Measuring the structure and equation of state of polyethylene terephthalate at megabar pressures. Scientific Reports, 2021, 11 (1), ⟨10.1038/s41598-021-91769-0⟩. ⟨hal-03266753⟩
52 View
25 Download

Altmetric

Share

Gmail Facebook X LinkedIn More