Responsive Solids from Cross-Linked Block Copolymers

Hyeok Hahn, Hany B. Eitouni, Nitash P. Balsara, and John A. Pople

Phys. Rev. Lett. 90, 155505 – Published 16 April 2003

Abstract

Novel responsive solids were prepared by randomly cross-linking the polyisoprene chains of a disordered polystyrene-polyisoprene block copolymer. Our experiments show that block copolymer chains, composed of hundreds of repeat units, can undergo reversible order-disorder transitions despite the quenched randomness that arises due to the attachment of one of the blocks to a cross-linked network. The structure, properties, and phase behavior of these materials are determined by a delicate interplay between the density of cross-links and the nature of the ordered state.

Received 14 October 2002

DOI:https://doi.org/10.1103/PhysRevLett.90.155505

Authors & Affiliations

Hyeok Hahn¹, Hany B. Eitouni^1,2, Nitash P. Balsara^1,2, and John A. Pople³

¹Department of Chemical Engineering, University of California, Berkeley, California 94720
²Materials Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720
³Stanford Synchrotron Radiation Laboratory, SLAC, P.O. Box 4349, Stanford, California 94309

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Vol. 90, Iss. 15 — 18 April 2003

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