Periodicity-dependent stiffness of periodic hydrophilic-hydrophobic hetero-polymers

Chowdhury, Debashish ; Stauffer, Dietrich ; Strey, Reinhard (1999) Periodicity-dependent stiffness of periodic hydrophilic-hydrophobic hetero-polymers Physical Review E, 60 (2). R1158-R1161. ISSN 1063-651X

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From extensive Monte Carlo simulations of a Larson model of perfectly periodic heteropolymers (PHP) in water, a striking stiffening is observed as the period of the alternating hydrophobic and hydrophilic blocks is shortened. At short period and low temperature needlelike conformations are the stable conformations. As temperature is increased thermal fluctuations induce kinks and bends. At large periods compact oligomeric globules are observed. From the generalized Larson prescription, originally developed for modeling surfactant molecules in aqueous solutions, we find that the shorter the period is the more stretched the PHP is. This novel effect is expected to stimulate polymer synthesis and trigger research on the rheology of aqueous periodic heteropolymer solutions.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:7840
Deposited On:25 Oct 2010 10:10
Last Modified:16 May 2016 17:57

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