Thermal and morphology characterization study of bio‐active poly(amide‐imide)‐based nanocomposites reinforced with modified SiO ₂ nanoparticle with poly(vinyl alcohol)

Among the nanoparticles (NPs), the amorphous SiO ₂ NPs are very useable, because of their important characteristics for different applications, such as mechanical performance, thermal properties, and biodegradability effects. For this manifest features SiO ₂ NPs were used as filler in this study. Firstly, these NPs were modified with poly(vinyl alcohol) (PVA). Then, the poly(amide‐imide) (PAI) was synthesized from reaction between N‐ trimellitylimido‐ l ‐methionine and 4,4′‐diaminodiphenylether in the presence of ionic liquid and triphenyl phosphite. Next, the modified SiO ₂ NPs with PVA (SiO ₂ ‐PVA) were incorporated into the PAI matrix for the preparation of PAI‐SiO ₂ ‐PVA nanocomposites (PSiPNs). Finally, the resulting SiO ₂ ‐PVA and PSiPNs were characterized by different analyses like field emission scanning electron microscopy, Fourier transform infrared spectroscopy, X‐ray diffraction, transmission electron microscopy, and thermogravimetric analysis (TGA). TGA showed high thermal stability of the obtained PSiPNs compared to the pure PAI. POLYM. COMPOS. 37:1231–1237, 2016. © 2014 Society of Plastics Engineers