Otomotiv Sektöründe Kullanılan MWCNT Katkılı Poliüretan Nanokompozitlerin Eğilme Hasarının İncelenmesi (original) (raw)

JOURNAL OF CHARACTERIZATION

Traditional materials such as metal, ceramic, polymer, etc. have been widely used in different applications since the beginning of mankind. Today, composite materials are among the fastest growing material classes, offering great potential in optimizing material performance by combining the advantages of several different component materials. Polyurethane composites (PUCs) have admirable features such as low density, excellent flexibility, shape memory, high wear resistance, corrosion resistance, high elongation at break, damping ability, resistance to weather conditions, high elasticity, anti-aging, good machinability, high impact resistance, excellent brightness. Polymer nanocomposites reinforced with nanoparticles have become a remarkable milestone in materials science, both in academic and industrial fields. In this study, polymer nanocomposite materials were produced by filling multi-walled carbon nanotubes (MWCNTs) in the polyurethane resin with the solution preparation method at the ratios of 0.25, 0.35 and 0.45 by weight. Bending strength, Young's modulus, toughness, rupture strains of PU nanocomposites filled with different addinng ratios of MWCNTs were compared with pure PU. MWCNT doped polyurethane nanocomposite materials were produced and then three point bending specimens of these materials according to ASTM D790-02 standard were prepared. While the flexural strength of pure polyurethane was 25 MPa, the flexural strength of 0.35% MWCNT filled polyurethane nanocomposite material was 36.7 MPa with an increase of 46.8%. It was observed that the stiffness of MWCNT filled PU nanocomposites increased compared to pure polyurethane resin. In addition, the damage behavior of the fractured surfaces was examined by scanning electron microscopy (SEM).