Nanoparticles dispersion in processing nanostructure chiral poly(amide-imide)s based on 7v-trimellitylimido-z,-leucine/tio2 nanocomposites: Allocation and properties

• SHADPOUR MALLAKPOUR ^[1] ; MARZIYEH KHANI ^[1]
  1. [1] Isfahan University of Technology

     Isfahan University of Technology

     Irán

     
• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 58, Nº. 1, 2013, págs. 1603-1608
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • Poly(amide-imide)s (PAI)s as engineering materials have received more attention owing to their high thermal and chemical stability. Therefore, organic/ inorganic nanocomposite (NC) of these materials has been widely studied in the last few decades. Here, we present PAI-NCs preparation containing surface modified TiO2 nanoparticles (NP)s by employing silane coupling agent under ultrasonic process. Optically active nanostructure PAI was prepared from 5-(2-benzimidazole)-1,3-phenylenediamine (4) and chiral diacid monomer N-trimellitylimido-L-leucine (5) using molten salt tetrabuthylammonium bromide as an activating medium. A considerable improvement of properties can be achieved by inserting NPs into the polymer matrix. The results of field emission scanning electron microscopy and transmission electron microscopy indicated that there is a little aggregation of a large quantity of particles. Thermogravimetric analysis confirmed that the heat stability of the polymer NCs in the temperature range of 400-800 °C was enhanced.