Premium
Fourier‐Transform Rheology of Unvulcanized, Carbon Black Filled Styrene Butadiene Rubber
Author(s) -
Schwab Lukas,
Hojdis Nils,
Lacayo Jorge,
Wilhelm Manfred
Publication year - 2016
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201500356
Subject(s) - materials science , carbon black , natural rubber , styrene butadiene , rheology , composite material , percolation (cognitive psychology) , amplitude , shear modulus , percolation threshold , shear (geology) , polymer , styrene , copolymer , electrical resistivity and conductivity , optics , engineering , physics , electrical engineering , neuroscience , biology
Rubber materials filled with reinforcing fillers display nonlinear rheological behavior at small strain amplitudes below γ 0 < 0.1. Nevertheless, rheological data are analyzed mostly in terms of linear parameters, such as shear moduli ( G ′, G ″), which loose their physical meaning in the nonlinear regime. In this work styrene butadiene rubber filled with carbon black (CB) under large amplitude oscillatory shear (LAOS) is analyzed in terms of the nonlinear parameter I 3/1 . Three different CB grades are used and the filler load is varied between 0 and 70 phr. It is found that I 3/1 (φ) is most sensitive to changes of the total accessible filler surface area at low strain amplitudes (γ 0 = 0.32). The addition of up to 70 phr CB leads to an increase of I 3/1 (φ) by a factor of more than ten. The influence of the measurement temperature on I 3/1 is pronounced for CB levels above the percolation threshold.