Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 22, Issue 29, Pages 10203-10210Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201600478
Keywords
block copolymers; diffusion-ordered NMR spectroscopy; self-assembly; supramolecular chemistry; supramolecular polymers
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Funding
- Israeli Council for Higher Education
- US-Israel Binational Science Foundation (BSF) [2010046]
- Division Of Mathematical Sciences
- Direct For Mathematical & Physical Scien [2010046] Funding Source: National Science Foundation
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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.
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