Molecular dynamics of polystyrene solutions in microwave fields

Mark J. Purdue, J. M.D. MacElroy, D. F. O'Shea, Okuom Macduff, Frank D. Blum

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Equilibrium and nonequilibrium molecular dynamics simulation techniques were used to assess the influence of an applied microwave field on the dynamics of methylamine-methanol and methylamine-dimethylformamide (DMF) solutions bound within atactic polystyrene over a range of polymer densities from 35 to 96 wt % polymer. Atomistically detailed systems were studied, ranging from 3000 to 10 644 particles, using previously established potential models. Structural and dynamical properties were determined in the canonical (NVT) ensemble at 298 K. The simulated DMF self-diffusion coefficients in polystyrene solutions were compared with the zero-field experimental results established with pulsed-gradient spin-echo NMR spectrometry. A simulated external microwave field, with a rms electric field intensity of 0.1 VÅ, was applied to these systems and the simulated dynamical results over field frequencies up to 104 GHz were compared with the zero-field values. Simulated evidence of athermal effects on the diffusive characteristics of these mixtures is reported.

Original languageEnglish (US)
Article number204904
JournalJournal of Chemical Physics
Volume124
Issue number20
DOIs
StatePublished - May 28 2006

Fingerprint

Dimethylformamide
Polystyrenes
Molecular dynamics
polystyrene
Polymers
Microwaves
molecular dynamics
microwaves
polymers
Spectrometry
Methanol
echoes
diffusion coefficient
methyl alcohol
Electric fields
Nuclear magnetic resonance
gradients
nuclear magnetic resonance
electric fields
Computer simulation

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Purdue, M. J., MacElroy, J. M. D., O'Shea, D. F., Macduff, O., & Blum, F. D. (2006). Molecular dynamics of polystyrene solutions in microwave fields. Journal of Chemical Physics, 124(20), [204904]. https://doi.org/10.1063/1.2197496

Molecular dynamics of polystyrene solutions in microwave fields. / Purdue, Mark J.; MacElroy, J. M.D.; O'Shea, D. F.; Macduff, Okuom; Blum, Frank D.

In: Journal of Chemical Physics, Vol. 124, No. 20, 204904, 28.05.2006.

Research output: Contribution to journalArticle

Purdue, Mark J. ; MacElroy, J. M.D. ; O'Shea, D. F. ; Macduff, Okuom ; Blum, Frank D. / Molecular dynamics of polystyrene solutions in microwave fields. In: Journal of Chemical Physics. 2006 ; Vol. 124, No. 20.
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