Scale-Dependent Stiffness and Internal Tension of a Model Brush Polymer

John P. Berezney, Amanda B. Marciel, Charles M. Schroeder, Omar A. Saleh

Research output: Contribution to journalArticle

Abstract

Bottle-brush polymers exhibit closely grafted side chains that interact by steric repulsion, thereby causing stiffening of the main polymer chain. We use single-molecule elasticity measurements of model brush polymers to quantify this effect. We find that stiffening is only significant on long length scales, with the main chain retaining flexibility on short scales. From the elasticity data, we extract an estimate of the internal tension generated by side-chain repulsion; this estimate is consistent with the predictions of blob-based scaling theories.

Original languageEnglish (US)
Article number127801
JournalPhysical review letters
Volume119
Issue number12
DOIs
StatePublished - Sep 21 2017

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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