ملخص البحث :

Biodegradable polymers, such as polybutylene succinate (PBS), have attracted a lot of attention in the scientific community recently due to a rapid growth of intensive interest in the global environment for alternatives to petroleum-based polymeric materials. Chalcone (CH), hexadecylamine (HDA), and tetradecylamine (TDA) were used as one of organic compounds to modify natural clay (sodium montmorillonite). The clay modification was carried out by stirring the clay particles in an aqueous solution of CH-MMT, HDA-MMT and TDA-MMT increases from 1.27 to 1.51, 1.57 and 1.78 nm, respectively. The modified clay was then used in the preparation of the PBS/epoxidized palm oil (EPO) blend nanocomposites. They were prepared by incorporating 0.5–5% of CH-MMT, HDA-MMT and TDA-MMT. The interaction of the modifier in the clay layer was characterized by X-ray diffraction (XRD) and Fourier transform infrared (FTIR). The nanocomposites were synthesized by solution casting of the modified clay and a PBS/EPO blend at the weight ratio of 80/20, which has the highest increase in the tensile strength of the blend. The XRD, scanning electron microscopy and transmission electron microscopy results confirmed the production of nanocomposites. PBS/EPO modified clay nanocomposites show higher thermal stability and significant improvement of comparison with those of the PBS/EPO blend.

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This work discuss methods of preparation a series of organic is at in ligands via imination process, diazotaion reaction , cyclization reaction in types of conditions to synthesis many ligands from is at ine derivatives like ( is at in-thiadiazole , is at in- triazole, is at in- azo , is at ine –anil). All present organicis at ine ligands were characterized by spectral identification with types of techniques (Uv.Vis , FT.IR ,H.NMR, C.NMR)– spectrophotometric

ملخص البحث :

Polybutylin succinate)PBS / (Polycaprolactone)PCL and AZO from organic clays incorporating2-(diethylamino)ethyl 3-((4- acetylphenyl)diazenyl)-4-aminobenzoate montmorillonite (AZO-MMT) were used to produce polymer compounds by mixing the solution. These materials have been characterized using X-ray diffraction, infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and transmission electron microscopy (TEM). The nanocomposites have shown increased thermal stability. Where the results obtained from the XRD indicate that the materials prepared in this research are nanocomposites. The results of TEM were confirmed by the insertion of the nanocomposite. In addition, the solution molding process was used to prepare these nanocomposites, and these results were distinguished for comparison with the above- mentioned process

ملخص البحث :

Organclays (OBNTs) were prepared using two new organic surfactants including 3-(4-aminophenyl)- 1-(4-chlorophenyl)prop-2-en-1-on (CH) synthesized from a Claisen–Schmidt condensation reaction between p-aminoacetophenone and p-chlorobenzaldehyde; and 4-((4-nitrophenyl)diazenyl)-N- (pyrimidin-2-yl) (AZ) prepared from reaction of sulfadiazine and p-nitoaniline. Organclays OBNTs were characterized by Fourier transform infrared spectroscopy (FTIR) to evaluate the incorporation of surfactants in bentonite. The X-ray diffraction (XRD) technique was utilized to indicate the basal spacing of the treated clay as a measure of susceptibility of new organoclays. The FTIR and XRD results showed that the OBNTs were successfully incorporated in the layers of bentonite clay. Thermogravimetric analysis (TGA) was also used to determine thermal stability. An enhancement in stability was observed in OBNTs compare to pure bentonite. OBNTs prepared in this study can be used to produce disposable packaging a promising polymer nanocomposite.

ملخص البحث :

A glassy carbon electrode (GCE) was modified with a polybutylene succinate/epoxidized palm oil (PBS/EPO) clay nanocomposites; by using solution evaporation method, a new modified electrode PBS/EPO-clay nanocomposite was produced. The redox process of K 4[Fe(CN)6] during cyclic voltammetry was studied using the PBS/EPO-clay nanocomposites. It was found that the peak separation (ΔEpa-c) between the redox peaks of Fe(II)/Fe(III) in an aqueous solution of 0.1 M KClO4 and the current ratio of redox current peaks, (Ipa/Ipc) was ≈ 1 for the modified working electrode with PBS/EPO-clay nanocomposites, indicating good reversibility with weak conductivity of the modified electrode. The physical properties of the modified electrode PBS/EPO-clay nanocomposites included good hardness, high adhesion to the glassy carbon surfaces of electrode collectors, solubility and good stability of the PBS/EPO-clay nanocomposites at different pH media. Also, the sensitivity of the electrochemical analysis by cyclic voltammetric method was significantly dependent on the pH and the scan rate (SR). It was found that the couple of redox current peaks of K4[Fe(CN)6] in KClO4 solution were a reversible process: Fe(III)/Fe(II)