ANSTO Publications Online >
Journal Publications >
Journal Articles >

Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/1060

Title: Humidity-induced phase transitions in ion-containing block copolymer membranes.
Authors: Park, MJ
Nedoma, AJ
Geissler, PL
Balsara, NP
Jackson, A
Cookson, DJ
Keywords: Polymers
Polystyrene
Organic Compounds
Solvents
Organic Polymers
Petroleum Products
Hydrophylic Polymers
Inorganic Polymers
Issue Date: 25-Mar-2008
Publisher: American Chemical Society
Citation: Park, M. J., Nedoma, A. J., Geissler, P. L., Balsara, N. P., Jackson, A., & Cookson, D. (2008). Humidity-induced phase transitions in ion-containing block copolymer membranes. Macromolecules, 41(6), 2271-2277.
Abstract: The phase behavior of ion-containing block copolymer membranes in equilibrium with humidified air is studied as a function of the relative humidity (RH) of the surrounding air, ion content of the copolymer, and temperature. Increasing RH at constant temperature results in both disorder-to-order and order-to-order transitions. In-situ small-angle neutron scattering experiments on the open block copolymer system, when combined with wafer uptake measurement, indicate that the disorder-to-order transition is driven by an increase in the partial molar entropy of the water molecules in the ordered phase relative to that in the disordered phase. This is in contrast to most systems wherein increasing entropy results in stabilization of the disordered phase. © 2008, American Chemical Society
URI: http://dx.doi.org/10.1021/ma702320t
http://apo.ansto.gov.au/dspace/handle/10238/1060
ISSN: 0024-9297
Appears in Collections:Journal Articles

Files in This Item:

There are no files associated with this item.

Items in APO are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback