School of Nano & Advanced Materials Engineering, Changwon National University,Changwon, Korea

Polyhedral oligomeric silsesquioxane (POSS) have been emerged as a new chemical technology for reinforced organic-inorganic hybrids. Polymer incorporated POSS has advantages of the simplicity of processing and the excellent comprehensive properties of hybrid materials. POSS added to the conventional polyurethane acrylate (PUA) provides the increased elasticity, glass transition temperature (Tg), thermal stability and dimensional stability. Therefore, in this study, the effect of additional amounts of POSS on properties of PUA films has been investigated to determine the optimum additional amounts and to obtain the best properties. Properties of PUA films contained POSS were measured by Fourier transform infrared spectroscopy (FT-IR), dynamic mechanical thermal analysis (DMTA), thermogravimetric analysis (TGA) and contact angle measurement. With increasing POSS contents, modulus and thermal stability of PUA films are increased owing to the nanoscale reinforcement effect of POSS particles on PUA films and the surface free energies of PUA films are decreased. However, when the additional amounts of POSS into PUA films are higher, the properties of PUA films are deteriorated by aggregation of POSS particles.