Departmental Papers (MSE)

Document Type

Journal Article

Date of this Version

October 1999


We determined the local strain profile in sheared lamellar block copolymers. A trilayer model, based on elastic brushes separated by viscous interpenetration zones, captures the rheological response of these materials and provides a measure of the relative contributions of elastic versus viscous strain. The elastic chain distortions were evident from a reversible lamellar contraction, as measured from in situ small-angle x-ray scattering. The contraction was directly correlated to the elastic strain from our trilayer model; three distinct diblock copolymers conform to the predicted relationship, thus suggesting universal behavior.


Copyright American Physical Society. Reprinted from Physical Review Letters, Volume 83, Issue 14, October 1999, pages 2861-2864.
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Date Posted: 11 July 2006

This document has been peer reviewed.