Self-Assembly of Low-Molecular-Weight Asymmetric Linear Triblock Terpolymers: How Low Can We Go?

Molecules. 2020 Nov 25;25(23):5527. doi: 10.3390/molecules25235527.

Abstract

The synthesis of two (2) novel triblock terpolymers of the ABC type and one (1) of the BAC type, where A, B and C are chemically different segments, such as polystyrene (PS), poly(butadiene) (PB1,4) and poly(dimethylsiloxane) (PDMS), is reported; moreover, their corresponding molecular and bulk characterizations were performed. Very low dimensions are evident from the characterization in bulk from transmission electron microscopy studies, verified by small-angle X-ray data, since sub-16 nm domains are evident in all three cases. The self-assembly results justify the assumptions that the high Flory-Huggins parameter, χ, even in low molecular weights, leads to significantly well-ordered structures, despite the complexity of the systems studied. Furthermore, it is the first time that a structure/properties relationship was studied for such systems in bulk, potentially leading to prominent applications in nanotechnology and nanopatterning, for as low as sub-10 nm thin-film manipulations.

Keywords: 1H-NMR; Flory–Huggins interaction parameters (χ); SAXS; SEC; TEM; anionic polymerization; linear triblock terpolymers; self-assembly in bulk; sequential addition of monomers.

MeSH terms

  • Anions / chemistry
  • Microscopy, Electron, Transmission
  • Molecular Weight*
  • Polymerization*
  • Polymers / chemistry*
  • Spectrum Analysis
  • Temperature

Substances

  • Anions
  • Polymers