Article (Scientific journals)
Anomalous glass transition behavior of SBR–Al2O3 nanocomposites at small filler concentrations
Sushko, Rymma; Filimon, Marlena; Dannert, Rick et al.
2014In Nanotechnology, 25 (42), p. 425704
Peer reviewed
 

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Keywords :
nanocomposites; nanoparticles; DMA; styrene-butadiene; alumina; glass transition; TMDSC
Abstract :
[en] Elastomers filled with hard nanoparticles are of great technical importance for the rubber industry. In general, fillers improve mechanical properties of polymer materials, e.g. elastic moduli, tensile strength etc. The smaller the size of the particles the larger is the interface where interactions between polymer molecules and fillers can generate new properties. Using temperature-modulated differential scanning calorimetry and dynamic mechanical analysis, we investigated the properties of pure styrene-butadiene rubber (SBR) and SBR/alumina nanoparticles. Beside a reinforcement effect seen in the complex elastic moduli, small amounts of nanoparticles of about 2 wt% interestingly lead to an acceleration of the relaxation modes responsible for the thermal glass transition. This leads to a minimum in the glass transition temperature as a function of nanoparticle content in the vicinity of this critical concentration. The frequency dependent elastic moduli are used to discuss the possible reduction of the entanglement of rubber molecules as one cause for this unexpected behavior.
Disciplines :
Physics
Author, co-author :
Sushko, Rymma ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Filimon, Marlena ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Dannert, Rick ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Elens, Patrick ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Sanctuary, Roland ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Baller, Jörg ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Title :
Anomalous glass transition behavior of SBR–Al2O3 nanocomposites at small filler concentrations
Publication date :
03 October 2014
Journal title :
Nanotechnology
Volume :
25
Issue :
42
Pages :
425704
Peer reviewed :
Peer reviewed
Available on ORBilu :
since 02 October 2014

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