The transport properties of high free volume glassy polymers and in particular of PTMSP was inspected by comparing in particular the steady state permeation behavior with the transient diffusion of light hydrocarbons. It has been remarkable observed that the apparent diffusivity measured in the two different modes are indeed quite different from one another even by nearly an order of magnitude. The behavior can be clearly explained by considering the high free volume glassy polymer as a two-phase system formed by a continuous solid phase and a discontinuous nanovoid phase, the distribution of which explains the observed behavior

Differences between transient and steady-state mass transport in high free volume glassy polymers

SARTI, GIULIO CESARE;GIACINTI BASCHETTI, MARCO;DOGHIERI, FERRUCCIO;
2005

Abstract

The transport properties of high free volume glassy polymers and in particular of PTMSP was inspected by comparing in particular the steady state permeation behavior with the transient diffusion of light hydrocarbons. It has been remarkable observed that the apparent diffusivity measured in the two different modes are indeed quite different from one another even by nearly an order of magnitude. The behavior can be clearly explained by considering the high free volume glassy polymer as a two-phase system formed by a continuous solid phase and a discontinuous nanovoid phase, the distribution of which explains the observed behavior
World Congress of Chemical Engineering-Abstract CD
G.C. Sarti; M. Giacinti Baschetti; F. Doghieri; B.D. Freeman
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/21604
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