The properties of polymers can be significantly changed by incorporating nanoparticles, which yields a great potential for applications. In the present study we use nanocomposites of new polyurea elastomers filled with 0.1, 0.5 and 1 wt-% MoS2 nanotubes. Using dynamic mechanical analysis (DMA) measurements we show, that the glass transition temperatures Tg of the nanocomposites are increased by small amounts of inorganic nanotubes. In line with results from computer simulations of polymer melts with nanoscopic particles, we explain the observed shift of Tg to be due to a gradual slowing down of polymer chain dynamics in the proximity of nanotubes.
Influence of inorganic nanoparticles on the glass transitions of polyurea elastomers / Marius Reinecker ; Armin Fuith; Viktor Soprunyuk; Antoni Sánchez-Ferrer; Raffaele Mezzenga; Aleš Mrzel; Renato Torre ; Wilfried Schranz. - In: PHYSICA STATUS SOLIDI. A, APPLICATIONS AND MATERIALS SCIENCE. - ISSN 1862-6319. - STAMPA. - 210:(2013), pp. 2320-2327. [10.1002/pssa.201329317]
Influence of inorganic nanoparticles on the glass transitions of polyurea elastomers
TORRE, RENATO;
2013
Abstract
The properties of polymers can be significantly changed by incorporating nanoparticles, which yields a great potential for applications. In the present study we use nanocomposites of new polyurea elastomers filled with 0.1, 0.5 and 1 wt-% MoS2 nanotubes. Using dynamic mechanical analysis (DMA) measurements we show, that the glass transition temperatures Tg of the nanocomposites are increased by small amounts of inorganic nanotubes. In line with results from computer simulations of polymer melts with nanoscopic particles, we explain the observed shift of Tg to be due to a gradual slowing down of polymer chain dynamics in the proximity of nanotubes.File | Dimensione | Formato | |
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