Abstract
Polyvinyl alcohol (PVA) is a material with a variety of applications in separation, biotechnology, and biomedicine. Using combined Monte Carlo and molecular dynamics techniques, we present an extensive comparative study of second- and third-generation force fields Universal, COMPASS, COMPASS II, PCFF, and the newly developed INTERFACE, as applied to this system. In particular, we show that an INTERFACE force field provides a possibility of composing a reliable atomistic model to reproduce density change of PVA matrix in a narrow temperature range (298–348 K) and calculate a thermal expansion coefficient with reasonable accuracy. Thus, the INTERFACE force field may be used to predict mechanical properties of the PVA system, being a scaffold for hydrogels, with much greater accuracy than latter approaches.
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Acknowledgements
This study was supported by the project “Determination of an influence of composition and spatial structure of hydrogels on the properties of entrapped biocatalysts” financed by NCN 2015/19/D/ST8/01899 (Poland). The computations have been carried out in Wroclaw Networking and Supercomputing Centre WCSS under computational grant no. 172 using BIOVIA Materials Studio 8.0 software.
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Radosinski, L., Labus, K. Molecular modeling studies of structural properties of polyvinyl alcohol: a comparative study using INTERFACE force field. J Mol Model 23, 305 (2017). https://doi.org/10.1007/s00894-017-3472-z
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DOI: https://doi.org/10.1007/s00894-017-3472-z