Evidence of percolated network at the linear - Nonlinear transition in oscillatory shear
Paper i proceeding, 2019

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(ethylene- butyl 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.

Författare

Karolina Gaska

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

Roland Kádár

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

AIP Conference Proceedings

0094-243X (ISSN) 1551-7616 (eISSN)

Vol. 2107 050003
978-073541839-4 (ISBN)

8th International Conference on Novel Trends in Rheology
Zlin, Czech Republic,

Ämneskategorier

Polymerkemi

Kompositmaterial och -teknik

Den kondenserade materiens fysik

DOI

10.1063/1.5109509

Mer information

Senast uppdaterat

2019-11-11