Journal article
A Direct Quantitative Measure of Surface Mobility in a Glassy Polymer
Abstract
Thin polymer films have striking dynamical properties that differ from their bulk counterparts. With the simple geometry of a stepped polymer film on a substrate, we probe mobility above and below the glass transition temperature Tg. Above Tg the entire film flows, whereas below Tg only the near-surface region responds to the excess interfacial energy. An analytical thin-film model for flow limited to the free surface region shows excellent …
Authors
Chai Y; Salez T; McGraw JD; Benzaquen M; Dalnoki-Veress K; Raphaël E; Forrest JA
Journal
Science, Vol. 343, No. 6174, pp. 994–999
Publisher
American Association for the Advancement of Science (AAAS)
Publication Date
February 28, 2014
DOI
10.1126/science.1244845
ISSN
0036-8075