Quasi-Block Copolymers Based on a General Polymeric Chain Stopper

Rajashekharayya A. Sanguramath, Paul F. Nealey, Roy Shenhar*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Quasi-block copolymers (q-BCPs) are block copolymers consisting of conventional and supramolecular blocks, in which the conventional block is end-terminated by a functionality that interacts with the supramolecular monomer (a “chain stopper” functionality). A new design of q-BCPs based on a general polymeric chain stopper, which consists of polystyrene end-terminated with a sulfonate group (PS-SO3Li), is described. Through viscosity measurements and a detailed diffusion-ordered NMR spectroscopy study, it is shown that PS-SO3Li can effectively cap two types of model supramolecular monomers to form q-BCPs in solution. Furthermore, differential scanning calorimetry data and structural characterization of thin films by scanning force microscopy suggests the existence of the q-BCP architecture in the melt. The new design considerably simplifies the synthesis of polymeric chain stoppers; thus promoting the utilization of q-BCPs as smart, nanostructured materials.

Original languageAmerican English
Pages (from-to)10203-10210
Number of pages8
JournalChemistry - A European Journal
Issue number29
StatePublished - 11 Jul 2016

Bibliographical note

Publisher Copyright:
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


  • block copolymers
  • diffusion-ordered NMR spectroscopy
  • self-assembly
  • supramolecular chemistry
  • supramolecular polymers


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