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Title: High-accuracy high-mass-ratio simulations for binary neutron stars and their comparison to existing waveform models
Award ID(s):
2011729
NSF-PAR ID:
10380971
Author(s) / Creator(s):
; ; ; ;
Date Published:
Journal Name:
Physical Review D
Volume:
106
Issue:
2
ISSN:
2470-0010
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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  1. ABSTRACT

    Phosphonium‐containing polyelectrolyte networks (PENs) (P1P4) were prepared by cyclotrimerization of bis(4‐acetylphenyl)diphenylphosphonium bromide (M1) and 1,4‐diacetylbenzene (M2) withp‐toluene sulfonic acid in variousM1:M2ratios (1,0, 1:1, 1:2, and 1:4). The relative abundance of the PAr4+units in each PEN was demonstrated to influence thermal stability, alkaline stability, water uptake, surface area, and CO2uptake in predictable ways. Impressively, PENs with NTf2counterions (Tf = CF3SO3) did not exhibit 5% mass loss until heating above 400 °C. Alkaline stability, tested by challenging a PEN with 6MNaOH(aq) at 65 °C for 120 h, increased with increasing PAr4+content, which reflected the enhanced reactivity of the HOanion in more hydrophobic materials (i.e., PENs with lowerM1:M2ratios). The specific surface areas estimated by Brunauer‐Emmett‐Teller (BET) analysis for these PENs were above 60 m2/g under N2and nearly 90 m2/g under CO2. Notably,P3(in which 33% of monomers comprise a phosphonium moiety) exhibited a CO2uptake affinity of one CO2molecule adsorbed for every phosphonium site. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem.2019,57, 598–604

     
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