A Schiff base ligand of o-vanillin and 4-aminoazobenzene its transition metal complexes Ni(II), Co(II), Zn(II), Cu(II), Mn(II), Zr(IV) were prepared under microwave irradiation as a green approach compared to the conventional method. The structures new compounds have been characterized elucidated via elemental spectroscopic analyses. In addition, magnetic susceptibility, electron spin resonance, electronic spectra synthesized explained their geometrical structures. thermal stability was...

In this work, three triazole Schiff base derivatives 1-((1H-1,2,4-triazol-3-ylimino)methyl)naphthalen-2-ol (TMN), N-(furan-2-ylmethylene)-1H-1,2,4-triazol-3-amine (FTA) and N-(thiophen-2-ylmethylene)-1H-1,2,4-triazol-3-amine (TTA) were synthesized under ultrasonic irradiation investigated as corrosion inhibitors. FT-IR, NMR, elemental analysis used to elucidate the chemical structure of The inhibitive characteristics these inhibitors on C-steel in 1.0 M HCl studied using different...

The objective of this research was to investigate the effect non-durable flame retardant (NDFR) coating samples polyester fabric untreated and treated with UV/Ozone for different periods. For purpose, these were tested by Fourier transform infrared (FTIR) spectroscopy, thermal analysis tests as thermo-gravimetric (TGA) differential scanning calorimeter (DSC). ignition test applied using limiting oxygen index (LOI), chamber (UL/94). Results indicated that both AZ2 (dried at room temperature)...

New polypropylene (PP) blends were prepared using phenyltrimethoxysilane (PTMS), glycidoxypropyltrimethoxysilane (GPTMS) and potassium-montmorillonite (K-MMT). Polymers A (K-MMT/PTMS), B (MMT/GPTMS) C (modified-MMT) sol-gel technique then incorporated in the PP matrix by different concentrations. Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), differential scanning calorimeter (DSC) used to investigate structure thermal stability. The mechanical properties...

For many years, amino methylenephosphonate (-CH2-N-PO3H2)-based scale inhibitors (SIs) have been deployed for preventing various scales in the oil and gas industry, particularly squeeze treatment applications. However, this class of phosphonate showed several limitations related to environmental concerns compatibility with brine solutions. The low toxicity low-molecular-weight polyethyleneimine (LMW-PEI) encouraged us a series branched linear PEIs via Moedritzer–Irani reaction. phosphonated...

Abstract Sol–gel films of tetraethoxysilane (TEOS), phenyltriethoxysilane (PTES) and phenyltrimethoxysilane (PTMS) were prepared on aluminium alloy AA7075 characterised. The corrosion inhibition properties uncoated coated specimens evaluated with potentiodynamic polarisation scan, linear resistance open circuit potential measurements. With scanning electron microscopy optical effects the sol–gel coating shown. Weight loss measurements performed at different pH‐values. More hydrophobic...

This paper aimed to modify the ignitability of bagasse by using talc powder, 1,3-di-aniline-2,2,2,4,4,4-hexachlorocyclodiphosph(V)azane, and nanocellulose crystal. The formation cellulose nanocrystals (CNCs) was detected transmission electron microscopy (TEM), X-ray diffraction (XRD). Thermal analysis as thermal gravimetric (TGA) specimens recorded improvement highest % ash residue at 750 °C compared untreated one. shape flame spread studied. ignition properties were studied for treated...

This research aimed to improve anti-dripping and ignitability properties of polyester fabric polyethylene terephthalate (PET) by using urea (CO(NH 2 ) ), phosphoric acid (H 3 PO 4 methyltrimethoxysilane (MTMS) via sol-gel technique. Methyl groups served as blocking preventing oxygen from penetrating into PET specimen, so the fire stopped. The interaction between coating irradiated surface was detected Fourier-transform infrared spectroscopy UV/ozone for different time periods. mechanical...

The study is focused on the synthesis of a new Co(II) and Ni(II) metal complexes, which synthesized by reaction isatin 4‐aminoantipyrine Schiff base ligand with selected divalent ions their possible applications as flame retardant additives in paint formulations for surface coating application. prepared complexes were characterized using combination Fourier transform infrared, elemental analysis, proton nuclear magnetic resonance, 13 C‐NMR spectra, mass spectroscopy. physically added to...

Polyester (PET) fabric is insecure to use since it melts at 249–290 °C, such molten PET could drip on underlying surfaces or human skin and hence become harmful. The rapidly ignited flammable materials found in nearby areas might lead damage life property of consumers. In this research, the was modified avoid these disadvantages. Thus we investigate effect phosphorylated sol-gel coating material UV/Ozone pre-modified polyester sample for different periods. thermogravimetric analysis (TGA)...

The purpose of this research is to improve ignition properties and anti-dripping polyester fabric by using adhesion promoter (AP). the untreated treated specimens with durable flame retardant coating non-durable were estimated horizontal chamber (UL-94), single-flame source limiting oxygen index (LOI). chemical structures pre- final composites have been determined Fourier transform infrared spectra attenuated total reflection analysis spectroscopy. mechanical tests thermal applied study...

This manuscript was built on studying the ignition, thermal, mechanical and electrical conductivity properties of polypropylene by blending with different weight percentages zinc borate (ZB) potassium montmorillonite (MM). The tensile strength (TS) elongation percentage ( E%) specimen were investigated. thermogravimetric analysis (TGA) differential thermal (differential scanning calorimetry) examined. LCR Meter instrument (Agilent E4980A, USA) used to measure characteristics specimens. heat...

A tridentate Schiff base ligand (E)-1-(2-hydroxy-3-methoxybenzylidene)-3-phenylurea derived from o-vanillin and phenyl urea in 1:1 molar ratio. Also, the metal complexes of Mn (II), Co Ni Cu Zn (II) Zr (IV) were synthesized using microwave-assisted irradiation conventional methods. The its 1-6 characterized elemental analysis, FT-IR, UV-vis, 1HNMR, mass spectroscopy as well thermo-gravimetric analysis (TGA). geometry structures confirmed electronic spectra, electron spin resonance (ESR)...

Right ventricular (RV) systolic dysfunction and pulmonary hypertension are associated with mortality in adults coarctation of aorta (COA). The tricuspid annular plane excursion/RV pressure (TAPSE/RVSP) ratio is a validated noninvasive tool for the assessment RV-pulmonary arterial (RV-PA) coupling patients PA hypertension, but similar data lacking COA. purpose this study was to assess relationship between TAPSE/RVSP outcomes population.

This manuscript aimed to enhance the mechanical, thermal, and ignition properties of bagasse paper when coated with different coatings synthesized from hydroxyethyl cellulose, 1,3-di-p-toluidine-2,2,2,4,4,4-hexachlorocyclodiphosph(V)azane, Talc powder, NaHCO3, cellulose nanocrystal. The effect these on mechanical was studied by measuring elongation, tensile strength, burst strength. stages degradation ash residue specimens were determined using thermal gravimetric analysis (TGA), behind...

Aortic valve disease is common in adults with coarctation of aorta. However, no systematic comparative analyses have been performed the clinical course aortic for male vs female patients this population. The purpose study was to compare cardiac remodelling, onset symptoms, and incidence replacement (AVR) patients.