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Tuning the Conductivity of Nanocomposites through Nanoparticle Migration and Interface Crossing in Immiscible Polymer Blends: A Review on Fundamental Understanding

Salehiyan, Reza; Ray, Suprakas Sinha

Authors

Reza Salehiyan

Suprakas Sinha Ray



Abstract

This article critically reviews the detailed fundamental understanding of the influence of conductive nanoparticle migration on the localization, and hence, electrical conductivity of immiscible polymer blend nanocomposites. Three types of conductive nanoparticles, namely, spherical, tubular, and platelet, are discussed with respect to their migration and electrical conductivity of obtained nanocomposites. A complete migration process consists of bulk migration within one component, contact with the interface, and penetration to the other component. During processing, the wetting coefficient parameter is the main thermodynamically controlling factor for nanoparticle localization. However, kinetic effects, such as mixing sequence and intensity, viscosity ratio, size and shape of the nanoparticles, and mixing time, can play a substantial role in determining the final locations of nanoparticles. Moreover, the rate of migration varies with the surface chemistry of the nanoparticles. It has been reported that nanoparticles in a more viscous phase move slower compared with a low viscous phase. Furthermore, nanoparticles having high aspect ratios and surface polarities compatible with the other component migrating faster. It is established that immiscible polymer blend nanocomposites with a ?double percolation? structure having higher conductivity with nanoparticles are localized at the interface of the co-continuous blends.

Journal Article Type Article
Online Publication Date Oct 4, 2018
Publication Date 2019-02
Deposit Date Jan 30, 2023
Journal Macromolecular Materials and Engineering
Print ISSN 1438-7492
Publisher Wiley-VCH Verlag
Peer Reviewed Peer Reviewed
Volume 304
Issue 2
Article Number 1800431
DOI https://doi.org/10.1002/mame.201800431
Keywords conductivity; interfaces; migration; nanoparticles; percolation; polymer blends