Ayman S. Al-Hussaini

Non-conventional synthesis and antibacterial activity of poly(aniline-co-o-phenylenediamine)/bentonite nanocomposites

Copolymers of aniline and o-phenylenediamine/hydrophilic bentonite nanocomposites were synthesized by 5:1 M ratios of the respective monomers with different percentages of nanoclay via modified in situ chemical copolymerization. The results were justified by measuring the FT-IR for PANI-o-PDA/bentonite nanocomposites. The thermal stability was studied. PANI-o-PDA/bentonite nanocomposites were thermally more stable than pure polymer. The antibacterial activities of PANI-o-PDA/bentonite nanocomposites towards both Gram-positive and Gram-negative bacteria were investigated.

Synthesis and characterization of new thermally stable polymers as new high-performance engineering plastics

A series of new poly(imino ether)s (PIEs) have been synthesized via palladium-catalyzed polycondensation of 4,4′-dibromodiphenyl ether with various aromatic diamines. All PIEs were fully characterized by Fourier transform infrared spectroscopy, elemental analyses, differential scanning calorimetry, thermogravimetric analysis, gel permeation chromatography, and x-ray diffraction. These polymers show high thermal stability and high decomposition temperatures. A model compound was synthesized and characterized by standard spectroscopic methods in order to confirm the proposed structure and to assist in the structure proof of the polymer.

In Situ Polymerization and Characterization of Aniline and O-Anthranilic Acid Copolymer/Pyrogenic Silica Nanocomposites

Copolymers of aniline and o-anthranilic acid/amorphous fumed silica nanocomposite are synthesized by 5:1 molar ratios of the respective monomers with different percentages of silica nanoparticles via in situ chemical co-polymerization. The electrical conductivity and spectral characteristics upon incorporation of o-anthranilic acid units into the polyaniline backbone in presence of silica nanoparticles are investigated. The results are justified by measuring the UV-Vis absorption spectra, FT-IR for PANAA copolymer, and in situ PANAA/silica nanocomposite. Also, the thermal gravimetric analysis for the copolymer powder formed in the bulk in absence and in presence of silica nanoparticles are carried out.

Cheap Synthesis, Characterization and Antibacterial Efficacy of New Copoly(o-Nitroaniline-co-o-Phenylenediamine) Emeraldine Base/Bentonite Composites

Copolymers of o-nitroaniline and o-phenylenediamine/Hydrophilic bentonite composites were synthesized by 1:1 molar ratios of the respective monomers with different percentages of nanoclay via modified in situ chemical co-polymerization. The results were justified by measuring the FT-IR for the pristine copolymer and copolymer bentonite composites. The thermal stability was studied by TGA thermograms indicating that the copolymer emeraldine base/bentonite composites were thermally more stable than the pristine copolymer. Also, both a hypsochromic and a blue shift were observed and recorded by UV–Vis absorption spectra. The X-ray powder diffraction patterns were utilized to examine the nature of the copolymer emeraldine base and the bentonite composites. The antibacterial efficacy of the copolymer emeraldine base/bentonite composites was investigated towards both Gram-positive and Gram-negative bacteria.Graphical Abstract

Modified Nonconventional Synthesis of New Terpoly(Aniline, o-Anthranilic Acid and o-Phenylenediamine)/Bentonite Composites

Terpolymers of aniline, anthranilic acid and o-phenylenediamine/Hydrophilic bentonite composites were synthesized using a 1:1:1 molar ratio of the respective monomers with different percentages of clay via modified in situ chemical terpolymerization. The spectral characteristics upon incorporation of anthranilic acid units into the copoly(aniline o-phenylenediamine) backbone in absence and in presence of bentonite nanoparticles were investigated. Moreover, terpolymer/bentonite composites were thermally more stable than pure terpolymer under nonoxidative condition. On the basis of surface morphological studies of terpolymer composites, a platy network texture can be explained, and it can be clearly seen in the SEM photomicrographs. GRAPHICAL ABSTRACT

In situ oxidative copolymerization and characterization of new poly(benzidine- co - o -phenylenediamine)/kaolinite microcomposites

Copolymers of benzidine and o-phenylenediamine/kaolinite clay composites with different percentages of kaolinite clay particles were synthesized via in situ oxidative copolymerization. The spectral characteristics upon incorporation of o-phenylenediamine units into the polybenzidine backbone in presence of kaolinite clay were investigated by means of UV–Vis and FTIR spectroscopy. The copolymer in the absence and in the presence of kaolinite clay was studied by thermal gravimetric analysis under non-oxidative conditions. The morphology of the copolymer kaolinite composites system was investigated by the scanning electron microscopy.

From Copolymer Precursor to Metal Oxides Nanoparticles: Synthesis and Characterization of Doped Copper and Cobalt Copolymer Via In Situ and Ex Situ Copolymerization

A series of new poly(aniline co-o-anthranilic acid) / copper, or cobalt composites were synthesized via chemical oxidation copolymerization with potassium dichromate as the oxidant in the presence of Cu, or Co by both in situ and ex situ methods. Aniline, o-anthranilic acid monomers and metal ratios were (1:1:0.5 and 1:1:1). The morphological, structural, and thermal properties were characterized with X-ray diffraction, Fourier transform infrared, thermogravimetric analysis, differential thermal analysis, and ultraviolet-visible spectroscopy. Greater 50% degradation temperature and char yield were observed in PANAA EB-Co vs. PANAA EB-Cu composite. The copper doped PANAA has been used as precursors to produce CuO in the nanoscale by annealing in air directly. The stages of decompositions and the calcination temperature of the precursors have been determined from the thermal analyses (TGA). The obtained CuO nanoparticles have been characterized by X-ray diffraction (XRD) and transmission electron microscope (TEM). TEM showed CuO nanoparticles with average particle size 25–44 nm.

New Crystalline Aniline and o-Anthranilic Acid Copolymer/Kaolinite Composites

Copolymers of aniline and o-anthranilic acid (PANAA)/kaolinite clay composites were synthesized by 5:1 molar ratios of the respective monomers with different percentages of kaolinite clay particles via in situ chemical co-polymerization. The spectral characteristics of the resulting copolymers were investigated. The results were justified by measuring the UV-Vis absorption spectra, FT-IR for PANAA copolymer, and the in situ PANAA/kaolinite clay composite. The thermal gravimetric analysis for the isolated copolymer powder in absence and in presence of kaolinite clay was carried out. Moreover, the morphology of the polymer clay composites system was studied by the scanning electron microscope micrographs at different magnifications. X-ray diffraction was used to measure the nature of the copolymer and extent of crystallinity present in the neat copolymer and copolymer/kaolinite composite materials.

New crystalline poly(aniline-co-benzidine)/bentonite microcomposites: synthesis and characterization

A new series of poly(aniline-co-benzidine)/bentonite microcomposites have been fabricated by fivefold molar amounts of aniline to benzidine through utilizing various bentonite quantities by in situ copolymerization. The obtained outcomes have been justified using spectral and thermal characteristics analyses. Furthermore, the copolymer microcomposites morphology has been investigated utilizing SEM and TEM. XRD of the pristine material and microcomposites revealed that they are polycrystalline in their nature.Graphical abstract