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Vol. 12, Special Issue, October 2011, pp.71-79

 

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Dynamic- and Thermo- mechanical Analysis of Inorganic Nanotubes/elastomer Composites

 

1 Armin FUITH, 1 Marius REINECKER, 2 Antoni SNCHEZ-FERRER, 2 Raffaele MEZZENGA, 3 Ale MRZEL, 4 Maris KNITE, 5 Ilze AULIKA,
6 Marija DUNCE and 1 Wilfried SCHRANZ

1 University of Vienna, Functional Materials, Boltzmanngasse 5, A-1090 Vienna, Austria

2 ETH Zurich, Institute of Food, Nutrition & Health, Food & Soft Materials Science Group, Schmelzbergstrasse 9, LFO, E23-E29, CH-8092 Zurich, Switzerland

3 J. Stefan Institute, Jamova 39, SI 1000 Ljubljana, Slovenia

4 Institute of Technical Physics, Riga Technical University, Azenes Str. 14/24, LV-1048, Riga, Latvia

5 Center for Space Human Robotics IIT@Polito, Corso Trento 21, 10129, Turin, Italy

6 Institute of Solid State Physics, University of Latvia, Kengaranga Str. 8, LV-1063, Riga, Latvia

E-mail: armin.fuith@univie.ac.at, marius.reinecker@univie.ac.at, wilfried.schranz@univie.ac.at, antoni.sanchez@agrl.ethz.ch, raffaele.mezzenga@agrl.ethz.ch, ales.mrzel@ijs.si, knite@latnet.lv, ilze.aulika@iit.it, mdunce@gmail.com

 

 

Received: 15 June 2011   /Accepted: 18 July 2011   /Published: 31 October 2011

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Abstract: We present dynamic mechanical analysis (DMA) and thermomechanical analysis (TMA) measurements of a new type of polyurea elastomer nanocomposites based on inorganic MoS2 nanotubes and Mo6S2I8 nanowires. The addition of a small amount of nanoparticles (<1 wt-%) leads to an increase of the glass transition temperature Tg as compared to the pure elastomeric matrix. A second peak observed in tand in the pure and mixed elastomer is attributed to a second glass transition occurring in regions near the hard nanodomains of the microphase separated polyurea system. It is also found that the small amount of nanoparticles leads to an increase in the Youngs modulus of up to 15 % in the whole measured temperature range (from -130 C to 20 C). The thermal expansion of doped samples is considerably larger above Tg. Below Tg, this difference vanishes completely. A very similar behaviour was also found in measurements of polyisoprene/multiwall carbon nanotube (MWCNT) composites.

 

Keywords: Inorganic nanotubes, Polymer nanocomposites, Dynamic mechanical analysis, Thermomechanical analysis, Glass transition, Elastomer, Polyurea

 

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