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

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

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

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

¹University 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

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 T_g 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 Young´s 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 T_g. Below T_g, 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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1 Armin FUITH, 1 Marius REINECKER, 2 Antoni SÁNCHEZ-FERRER, 2 Raffaele MEZZENGA, 3 Aleš MRZEL, 4 Maris KNITE, 5 Ilze AULIKA, 6 Marija DUNCE and 1 Wilfried SCHRANZ

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