Open AccessThe equation of state and shock-driven decomposition of polymethylmethacrylate (PMMA)
Author(s) -
Joshua D. Coe,
Meghan Lentz,
Kirill A. Velizhanin,
J. Tinka Gammel,
John Kaushagen,
Keith Jones,
Kyle Cochrane
Publication year - 2022
Publication title -
journal of applied physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.699
H-Index - 319
eISSN - 1089-7550
pISSN - 0021-8979
DOI - 10.1063/5.0080369
Subject(s) - shock (circulatory) , observable , decomposition , focus (optics) , equation of state , statistical physics , ab initio quantum chemistry methods , ab initio , thermodynamics , computational chemistry , theoretical physics , materials science , chemistry , physics , quantum mechanics , molecule , organic chemistry , optics , medicine
We present new equations of state (EOS) for polymethylmethacrylate and its shock-driven decomposition products, generated in both tabular form and as linear [Formula: see text] fits to all previously available shock data. Different approaches are taken for materials shocked above and below the apparent threshold for chemical reactions at pressures [Formula: see text] GPa. Both EOSs are calibrated to and compared with a broad array of experimental results, as well as new ab initio molecular dynamics simulations presented here. Comparisons are good in most cases, and we focus our particular attention on those observables that test the distinction between reactants and products.