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Colloid Polym Sci (2014) 292:22852294
DOI 10.1007/s00396-014-3281-1
ORIGINAL CONTRIBUTION
Effect of poly(amidimide)/Al2O3 hybrid with various ratios on the physicochemical properties of poly(vinyl alcohol) nanocomposites films
Shadpour Mallakpour & Elham Khadem
Received: 30 April 2014 /Revised: 19 May 2014 /Accepted: 20 May 2014 /Published online: 29 May 2014 # Springer-Verlag Berlin Heidelberg 2014
Abstract To study the effect of the various ratios of poly(amideimide)/Al2O3 nanocomposites (PANC)s on the mechanical and thermal properties of nanocomposites films, poly(vinyl alcohol) (PVA)/PANCs based on various ratios of 2, 4, and 6 wt% were prepared and characterized. In the first step, the surface of alumina nanoparticles was treated with 15 wt% of biosafe diacid and consequently, about 10 wt% of these modified nanoparticles were loaded into the poly(amideimide) matrix. Then, various contents of the obtained PANCs were incorporated into a PVA solution using a sonochemical treatment. The effects of PANC on the structure and morphology of PVA matrix were studied using powder X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, atomic force microscopy (AFM), and thermal gravimetric analysis (TGA). The results show that the tensile strength and decomposition temperature were improved as the portion of PANC into PVA matrix are increased from 2 to 6 wt%. Also, AFM pictures of the fracture surfaces of PVA/PANCs showed a significantly rougher surface than the neat PVA.
Keywords Alumina nanoparticle . Poly(amideimide) nanocomposite . Poly(vinyl alcohol) . Mechanical properties . Ultrasonic irradiation
Introduction
Nanocomposites (NC)s containing natural and synthetic hydrophilic polymers as poly(vinyl alcohol) (PVA) have received signification attention from the scientific viewpoint [1, 2]. Hydrophilic PVA as semicrystalline polymer was adopted by polymerization of vinyl acetate to poly(vinyl acetate), and then hydrolysis to the PVA macromolecule [3, 4]. Contrary to full carbon backbone of PVA, it was recognized as one of the most suitable biocompatibility and biodegradable synthetic macromolecules [5]. This polyhydroxy polymer, due to unique chemical and physical properties such as adhesive properties and excellent chemical resistant, has good film-forming and high hydrophilic properties, high tensile strength, and flexibility, is successfully used in extensive range of industrial fields and consumer products [68]. However, its properties depend on humidity, and therefore, PVA as a soluble polymer cannot be used in wide application. Accordingly, in order to elevate...