Preparation and characterization of thermally conductive thermoplastic polyurethane/h‐BN nanocomposites

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. POLYM. COMPOS., 35:530–538, 2014. © 2013 Society of Plastics Engineers

An overview of boron nitride based polymer nanocomposites

“…[ 122 ] Using this method preparation of thermoplastic polyurethane (TPU)/h‐BN nanocomposite films with excellent thermal conductivity was also reported. [ 123 ]…”

“…Hexagonal BN containing TPU nanocomposites were fabricated by melt blending and hot‐pressing techniques. [ 123 ] Higher thermal conductivity shown by nanocomposites can be increased with rise in temperature and amount of h‐BN particles.…”

Improved Thermal Stability and Wettability Behavior of Thermoplastic Polyurethane / Barium Metaborate Composites

“…Multiwalled carbon nanotubes, 11 aramid-short-fiber, 12 kenaf fibre, 13 nanosilicate, 14 graphene, 15 nano-sized hexagonal boron nitride 16 and mica 17 are only a small part of the inorganic additives used in thermoplastic polyurethane composites.…”

Fabrication, characterization, and in vitro evaluation of electrospun polyurethane‐gelatin‐carbon nanotube scaffolds for cardiovascular tissue engineering applications

“…Also, it should be noted that efficient interaction between the polyurethane hard segment and SWNTs and homogenous distribution of nanoparticles influence melting transition of polyurethane hard segments. Moreover, this phenomenon could be attributed to entanglement and interaction between gelatin macromolecules and polyurethane chains (Çakmakçı, Koçyiğit, Çakır, Durmus, & Kahraman, ; Kharaziha et al, ).…”