Evidence of percolated network at the linear-Nonlinear transition in oscillatory shear

Roland Kádár, Karolina Gaska

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Abstract

In this publication we review evidence for the detection of a percolated network in polymer nanocomposites at the linear - nonlinear transition in oscillatory shear tests. Two types of nanocomposites based on branched polymers as
matrix are compared: a low density polyethylene (LDPE) and graphite nanoplatelets (GnP) as filler and a poly(ethylenebutyl acrylate) (EBA) containing graphite nanoplatelets and carbon black (CB). Oscillatory shear tests were analyzed in the framework of Fourier-transform rheology and Tschebyshev polynomial decomposition. For both nanocomposites, in the vicinity of the electrical percolation threshold, i.e. the formation of a continuous filler network, a distinct region is evidence at the transition linear - nonlinear transition in the strain dependent third relative higher harmonics of the shear stress Fourier spectra. The region can be characterized by different strain amplitude dependence that could be related to the specific filler morphologies, however, further investigations are required to assess the factors that influence the linear - nonlinear transition region in polymer nanocomposites.
Original languageEnglish
Title of host publicationAIP Conference Proceedings
Pages050003-1 -050003-9
Number of pages9
Volume2107
Edition1
DOIs
Publication statusE-pub ahead of print - 21 May 2019

Fingerprint Dive into the research topics of 'Evidence of percolated network at the linear-Nonlinear transition in oscillatory shear'. Together they form a unique fingerprint.

Cite this