Rheology, sticky chain and sticker dynamics of supramolecular elastomers based upon cluster-forming telechelic linear and star polymers

Mordvinkin, A..et.al. Macromolecules, 2021, 5065–5076, https://doi.org/10.1021/acs.macromol.1c00655

We elucidate the properties of unentangled telechelic poly(isobutylene) (PIB) chains in bulk forming dynamic micellar networks mediated by endgroups capable of hydrogen-bonding and π–π interactions. The effects of the molecular architecture and type of endgroup on the properties of networks are studied by a combination of small-angle X-ray scattering (SAXS), rheology, low-resolution NMR, and dielectric spectroscopy (DS). It is found that star-shaped molecules form more time-stable networks with larger and somewhat more distantly arranged aggregates compared to their linear counterparts.Copyright © 2021 The Authors. Published by American Chemical Society.