Identifying the effect of aromatic oil on the individual component dynamics of S-SBR/BR blends by broadband dielectric spectroscopy

Journal article (2018)

Authors

A. Rathi University of Twente
M. Hernandez Santana Institute of Polymer Science and Technology (ICTP-CSIC), Novel Aerospace Materials - Aerospace Engineering
Santiago J. Garcia Novel Aerospace Materials - Aerospace Engineering
Wilma Dierkes University of Twente
Jacques W.M. Noordermeer University of Twente
Cristina Bergmann Hansen & Rosenthal
Jürgen Trimbach Hansen & Rosenthal
Anke Blume University of Twente
Research Group
Novel Aerospace Materials (Aerospace Engineering) (TU Delft)
BDS Differential Scanning Calorimetry Blends Component dynamics Dynamic Mechanical Analysis S-SBR/BR
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Published Date

2018

Language

English

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Faculty

Aerospace Engineering

Department

Aerospace Structures & Materials

Research Group

Novel Aerospace Materials

Abstract

Miscible S-SBR (solution styrene-butadiene copolymer)/BR (polybutadiene homopolymer) blends are used in multiple applications like modern passenger car tire treads. Despite their miscibility, there is a problem to predict tire performance due to dynamical heterogeneities present in the S-SBR/BR blends. On the one hand, S-SBR/BR blends have a thermorheologically complex behavior, which complicates the prediction of the temperature- and frequency-dependence of material properties. On the other hand, due to differences in the polarity of the individual components, the extender oils used in the elastomeric compounds could distribute unequally within the blends, where little is known about how oils interact with the two polymers. In this work a combination of Differential Scanning Calorimetry, Dynamic Mechanical Analysis, and Broadband Dielectric Spectroscopy (BDS) is used to clarify: (i) the thermorheological complexity of S-SBR/BR blends, (ii) the effect of the extender oil on the blend. The broad frequency operation of BDS allows for the analysis of the S-SBR and BR component dynamics and the effect of the oil on each of them within an S-SBR/BR (50/50) blend. Based on the discretization of individual component dynamics in the blend, conclusive remarks are made on the effect of the extender oil for either component in the blend.

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