Terminal flow of cluster-forming supramolecular polymer networks: Single-chain relaxation or micelle reorganization?

Anton Mordvinkin, Diana Döhler, Wolfgang H. Binder, Ralph H. Colby, Kay Saalwächter

Research output: Contribution to journalArticlepeer-review

Abstract

We correlate the terminal relaxation of supramolecular polymer networks, based on unentangled telechelic poly(isobutylene) linear chains forming micellar end-group clusters, with the microscopic chain dynamics as probed by proton NMR. For a series of samples with increasing molecular weight, we find a quantitative agreement between the terminal relaxation times and their activation energies provided by rheology and NMR. This finding corroborates the validity of the transient-network model and the special case of the sticky Rouse model, and dismisses more dedicated approaches treating the terminal relaxation in terms of micellar rearrangements. Also, we confirm previous results showing reduction of the activation energy of supramolecular dissociation with increasing molecular weight and explain this trend with an increasing elastic penalty, as corroborated by small angle x-ray scattering data.

Original languageEnglish (US)
Article number127801
JournalPhysical review letters
Volume125
Issue number12
DOIs
StatePublished - Sep 2020

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Terminal flow of cluster-forming supramolecular polymer networks: Single-chain relaxation or micelle reorganization?'. Together they form a unique fingerprint.

Cite this