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58 Ionel Oprea suplimentari, cum ar fi eficienţa, siguranţa sistemului şi aspectele economice sunt incluse în analiza detaliată.
BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI Publicat de Universitatea Tehnică „Gheorghe Asachi“ din Iaşi, Tomul LVIII (LXII), Fasc. 4, 2012 Secţia CONSTRUCŢII DE MAŞINI THERMAL PROPERTIES OF POLYSTYRENE/CARBON NANOTUBES COMPOSITES PREPARED BY SHEAR CASTING BY RĂZVAN FLORIN BARZIC ∗1 , IULIANA STOICA 2 , ANDREEA IRINA BARZIC 2 and GHEORGHE DUMITRAŞCU 1 1 “Gheorghe Asachi” Technical University of Iaşi, Faculty of Mechanics 2 “Petru Poni”Institute of Macromolecular Chemistry, Iaşi Received: November 10, 2012 Accepted for publication: November 30, 2012 Abstract. The polystyrene/carbon nanotubes (PS/CNT) composite films are obtained by a simple solution dispersion procedure. The carbon-based nanofillers are dispersed in methylene chloride, and PS/CNT composites are prepared by mixing PS/methylene chloride solution with CNT/methylene chloride dispersion, homogenized by ultrasonication. The corresponding films are characterized by atomic force microscopy (AFM) technique in order to evaluate the morphology developed by the resulted system. The thermal conductivity of these materials is estimated by considering it as an additive function of the PS and CNT compositions. The obtained results indicate that the studied nanocomposites exhibit high heat transfer – suitable for protecting chips of overheating in power electronics. Key words: thermal conductivity, polymer, carbon nanotubes. 1. Introduction Thermally conductive polymer composites offer new possibilities for replacing metal parts in several applications, including power electronics, electric motors and generators, heat exchangers, thanks to the polymer advantages such as light weight, corrosion resistance and ease of processing. ∗ Corresponding author: e-mail: barzicrazvan@tuiasi.ro, gdum@tuiasi.ro
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