Glass-Transition Temperature of Cyclic Polystyrene: A Computational Study

Arlette R.C. Baljon (Corresponding author), Gerardo Mendoza, N.K. Balabaev, A.V. Lyulin

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelpeer review

Samenvatting

Abstract: Molecular-dynamics simulations are employed to study the glass transition of cyclic polystyrene melts. Gibbs and DiMarzio’s theory predict an increase in glass transition temperature, Tg upon lowering the length of cyclic polymer chains, which is opposite to the well-known trend for linear polymers. Their theory has been confirmed by some experiments; however, others observe a decrease in Tg upon lowering the chain length instead. When volumetric methods are employed to obtain the glass transition temperature in simulated cyclic polystyrene, a slight increase with decreasing cyclic polystyrene chain length is obtained. This increase is more pronounced when glass transition temperatures are obtained from dynamics. Both the glass transition temperature Tg obtained from diffusion data and the ideal glass transition temperature T0 obtained from the decay of the orientational autocorrelation function of the phenyl bond show a clear upturn.

Originele taal-2Engels
Pagina's (van-tot)356-362
Aantal pagina's7
TijdschriftPolymer Science - Series A
Volume63
Nummer van het tijdschrift3
DOI's
StatusGepubliceerd - mei 2021

Bibliografische nota

Publisher Copyright:
© 2021, Pleiades Publishing, Ltd.

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

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