Volume 40, Number 2, October II 1997
|Page(s)||135 - 140|
|Section||Atomic, molecular and optical physics|
|Published online||01 September 2002|
Glass transition of an amphiphilic random copolymer and relation to the Ising model of spin-glass
Irish Centre for Colloid Science and Biomaterials,
Department of Chemistry, University College Dublin,
Belfield, Dublin 4, Ireland
Corresponding author: firstname.lastname@example.org
Accepted: 4 September 1997
We present the results of our study of the freezing transition of an amphiphilic random copolymer. We here confirm that a replica variational approach predicts a “scale”-dependent freezing transition due to the connectivity of the chain. In addition we suggest that two systems, a random copolymer and an Ising spin-glass, can be directly related to each other on the mean-field level in the vicinity of the freezing transition. Both systems have the same type of effective free energy. The properties of replica symmetrical (RS) and replica symmetry broken (RSB) solutions are discussed. The latter has larger radius of gyration and effective free energy, and is less phase separated. It might be related to a globule with more than one hydrophobic core.
PACS: 36.20.Ey – Conformation (statistics and dynamics) / 64.70.Pf – Glass transitions
© EDP Sciences, 1997
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