A green route for the synthesis of novel optically active poly(amide–imide) nanocomposites containing N-trimellitylimido-l-phenylalanine segments and modified alumina nanoparticles. (June 2014)

• Record Type: Journal Article
• Authors: Mallakpour, Shadpour; Khadem, Elham
• Is Part Of: High performance polymers. Volume 26:Number 4(2014:Jun.)
• Page Start: 392
• Page End: 400
• Publication Date: 2014-06
• Subjects: Modified α-Al2O3 nanoparticle -- poly(amide–imide) -- green conditions -- ultrasonic irradiation -- nanocomposites -- thermogravimetric analysis; Polymerization -- Periodicals; Polymers -- Periodicals; 547.7
• DOI: 10.1177/0954008313516820
• Languages: English
• ISSNs: 0954-0083

Abstract

In the present study, novel optically active poly(amide–imide)/alumina nanocomposites (PAI/Al2 O3 NCs) containing different amounts of modified α-Al2 O3 nanoparticles (NPs) were synthesized using the ultrasonic-assisted technique. To improve NPs dispersion and increase the possible interaction between NPs and PAI matrix, the surface of α-Al2 O3 NP was modified with bioactive diacid coupling agent. The PAI chains were formed from the polycondensation of N -trimellitylimido-l -phenylalanine diacid with 1, 5-diamino naphthalene under green conditions. The obtained polymer and inorganic metal oxide NPs were used to prepare chiral PAI/Al2 O3 NCs through the ultrasonic irradiation. PAI/Al2 O3 NCs were characterized by Fourier transform infrared spectra, x-ray diffraction patterns, field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and ultraviolet–visible (UV-Vis). TGA results confirmed that the heat stability of the prepared NP-reinforced composites was improved compared with the pure polymer. In addition, TEM and FESEM images showed that NPs were dispersed into the polymer matrix at nanoscale.