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A Novel Approach to Atomistic Molecular Dynamics Simulation of Phenolic Resins Using Symthons

Bone, Matthew A., Macquart, Terence, Hamerton, Ian and Howlin, Brendan J. (2020) A Novel Approach to Atomistic Molecular Dynamics Simulation of Phenolic Resins Using Symthons Polymers, 12 (4).

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Abstract

Materials science is beginning to adopt computational simulation to eliminate laboratory trial and error campaigns—much like the pharmaceutical industry of 40 years ago. To further computational materials discovery, new methodology must be developed that enables rapid and accurate testing on accessible computational hardware. To this end, the authors utilise a novel methodology concept of intermediate molecules as a starting point, for which they propose the term ‘symthon’a rather than conventional monomers. The use of symthons eliminates the initial monomer bonding phase, reducing the number of iterations required in the simulation, thereby reducing the runtime. A novel approach to molecular dynamics, with an NVT (Canonical) ensemble and variable unit cell geometry, was used to generate structures with differing physical and thermal properties. Additional script methods were designed and tested, which enabled a high degree of cure in all sampled structures. This simulation has been trialled on large-scale atomistic models of phenolic resins, based on a range of stoichiometric ratios of formaldehyde and phenol. Density and glass transition temperature values were produced, and found to be in good agreement with empirical data and other simulated values in the literature. The runtime of the simulation was a key consideration in script design; cured models can be produced in under 24 h on modest hardware. The use of symthons has been shown as a viable methodology to reduce simulation runtime whilst generating accurate models.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemistry
Authors :
NameEmailORCID
Bone, Matthew A.
Macquart, Terence
Hamerton, Ian
Howlin, Brendan J.B.Howlin@surrey.ac.uk
Date : 16 April 2020
Funders : Engineering and Physical Science Research Council (EPSRC)
DOI : 10.3390/polym12040926
Copyright Disclaimer : © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Uncontrolled Keywords : Material simulation; Molecular dynamics; Intermediate structures; Phenolic resins; Characterisation; Symthons
Depositing User : Diane Maxfield
Date Deposited : 27 May 2020 14:50
Last Modified : 27 May 2020 14:50
URI: http://epubs.surrey.ac.uk/id/eprint/856984

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