Impact of mixing procedure on phase morphology and fracture mechanical properties of carbon black-filled NR/SBR blends

Impact of mixing procedure on phase morphology and fracture mechanical properties of carbon... Based on a viscoelastic model, the filler distribution and the amount of interphase of carbon black-filled blends of natural rubber (NR) with styrene-butadiene rubber (SBR) are evaluated. Hereby, the total dissipated energy $$G''$$ G ′ ′ during dynamical straining is decomposed into the contributions of the different polymer phases and the interphase. For the NR/SBR blends, we find a higher filling of the SBR phase and the interphase and a lower filling of the NR phase. The filler distribution itself depends not only on the affinity of the polymer to the filler but also on the mixing procedure. This is investigated by studying NR/SBR blends prepared by two different mixing procedures. In the standard mixing procedure, the polymers are mixed first, and then, the filler is added. In the batch mixing procedure, the filler is previously mixed in the NR only and then blended with SBR. Batch mixing is resulting in an increase in the filling of the interphase due to filler transfer from NR to SBR. The results for the filler distribution are compared to fatigue crack propagation rates under pulsed excitation. The crack propagation is accelerated when substituting NR with SBR. The batched samples show higher crack propagation rates at higher tearing energies due to a worse dispersion of the carbon black and/or higher filler loading of the interphase. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Continuum Mechanics and Thermodynamics Springer Journals

Impact of mixing procedure on phase morphology and fracture mechanical properties of carbon black-filled NR/SBR blends

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2017 by Springer-Verlag Berlin Heidelberg
Subject
Physics; Classical and Continuum Physics; Engineering Thermodynamics, Heat and Mass Transfer; Theoretical and Applied Mechanics; Structural Materials
ISSN
0935-1175
eISSN
1432-0959
D.O.I.
10.1007/s00161-017-0562-1
Publisher site
See Article on Publisher Site

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