Preparation and Characterization of Thermally Conductive Thermoplastic Polyurethane/h-BN Nanocomposites


ÇAKMAKÇI E., Kocyigit C., Cakir S., Durmus A., KAHRAMAN M. V.

POLYMER COMPOSITES, vol.35, no.3, pp.530-538, 2014 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 35 Issue: 3
  • Publication Date: 2014
  • Doi Number: 10.1002/pc.22692
  • Journal Name: POLYMER COMPOSITES
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.530-538

Abstract

Polyurethane nanocomposites are versatile engineering polymers with unique properties. In this study, nano hexagonal boron nitride containing thermoplastic polyurethane elastomers were prepared via melt blending and hot-pressing techniques. The nanocomposites were characterized using Fourier transform infrared, differential scanning calorimetry, thermal gravimetric analysis, tensile tests, and thermal conductivity measurements. The surface morphology of the TPU/h-BN composites was characterized by scanning electron microscopy. The optical properties of the composites were determined by UV transmittance measurements and as the amount of h-BN increased, optical transparencies decreased dramatically. Nanocomposites displayed higher E-modulus values and lower elongation at break values than the pure TPU elastomer. Char yields of TPUs increased with increasing h-BN percentage. Moreover, thermal conductivity of the composite materials improved with the incorporation of h-BN.