Stress Relaxation in Diblock Copolymers

Details Stress Relaxation in Diblock Copolymers Stress Relaxation in Diblock Copolymers

2001-02-12

arxiv.org/abs/cond-mat/0102213v2

Complex Fluids, conference proceedings for conference in Sitges Spain, 1992, edited by Luis Garrido (Springer-Verlag, Heidelbe

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

We study stress relaxation in a strongly segregated lamellar mesophase of diblock copolymers. We consider the extreme limit in which chains are highly stretched and with their junction points confined to narrow interfaces. A lamella can be divided into "stress blobs" at some distance $z$ from the interface, with well defined local modulus $G(z,\omega)$ at frequency $\omega$. For sliding (compressional) stress the total modulus is transmitted in series (parallel) across the layer. We evaluate the local $G(z,t)$ which shows, for a given height, a very broad spectrum of relaxation times.

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