Issue 6, 2023

Microphase separation assisted reduction in the percolation threshold of MWCNT/block polymer composites

Abstract

Block copolymers continue to attract a great deal of interest since they allow the formation of microphase-separated domains, useful for nanopatterning/templating. Herein, we present the drastic effect of microphase separation of a diblock copolymer on the electrical properties of polymer nanocomposites. Microphase-separated poly(styrene-b-2-ethylhexyl acrylate) (P(St-b-EHA)) block copolymers having different block lengths were synthesized and utilized as templates for multi-walled carbon nanotubes (MWCNTs). The percolation threshold of the films decreased from 0.46 to 0.19 vol% with decreasing styrene phase fraction. More importantly, we observed a non-linear and unique reduction in percolation threshold with transforming the phase into lamellar structures.

Graphical abstract: Microphase separation assisted reduction in the percolation threshold of MWCNT/block polymer composites

Supplementary files

Article information

Article type
Paper
Submitted
20 9月 2022
Accepted
04 1月 2023
First published
07 1月 2023
This article is Open Access
Creative Commons BY-NC license

Soft Matter, 2023,19, 1109-1114

Microphase separation assisted reduction in the percolation threshold of MWCNT/block polymer composites

G. Topcu, D. Reinoso Arenas, T. McNally and C. R. Becer, Soft Matter, 2023, 19, 1109 DOI: 10.1039/D2SM01277D

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