16f pc ftir spectrometer

EXAMPLE 1

Materials and Methods:

Phenol (Ph), ethylene glycol (EG), diethylene glycol (DEG), triethylene glycol (TEG) and Tetraethylene glycol (TETA) and paraformaldehyde were purchased from Fluka Chemie AG (Buchs, Switzerland). heptane was supplied by Sigma-Aldrich, Germany. All other solvents and reagents employed were of analytical grade. The infrared spectra were recorded were analysed by Perkin Elmer 16F PC FTIR spectrometer in the 4000-500 cm-1 wavelength region. The solid NMR spectra were recorded by Bruker WB-400 spectrometer with a spinning rate of 10 KHz. The cross-linked polymers were analysed for powder xray diffraction by Rigaku Miniflex II Desktop X-ray Diffractometer with 30 and stop angle of 700 sampling step size of 0.03, scan speed 3.00, 30 KV and 15 mA. The concentrations of mercury samples before and after analysis were analysed Inductively Coupled Plasma Mass Spectroscopy model ICP-MS XSeries-II (Thermo Scientific). Thermal properties of the synthesized cross-linked polymers were performed on NETZSCH Thermal Analyzer, model DSC 204 F1 Phoenix and TG 209 F1 Libra, respectively.

Example 3

Characterization of PU

¹H and ¹³C NMR spectra of the synthesized PU in DMSO-d₆ were recorded on a JEOL 500 MHz NMR spectrometer using TMS as internal standard. IR spectrum was recorded on a Perkin Elmer 16F PC FTIR spectrometer using KBr as standard. Thermogravimetric analysis (TGA) was done on an SDT analyzer (Q600: TA instruments, USA). Approximately 5.8 mg of the polymer was taken in an aluminum crucible. The temperature was raised at a controlled rate of 15° C./min. The analysis was made over a temperature range of 20-1000° C. in air. Morphological studies of the steel specimen after exposure to 1.0 M HCl in the absence and presence of PU was carried out using scanning electron microscope, SEM (Genesis-2120 Emcrafts, Korea) and x-ray photoelectron spectrometer, XPS (Thermo Scientific ESCALAB 250 Xi).

Example 1

Materials and Methods

Melamine, diaminoalkanes, and paraformaldehyde were purchased from Fluka Chemie AG (Buchs, Switzerland). N, N-dimethylformamide (DMF) was supplied by Sigma Aldrich (Germany). All other solvents and reagents employed were of analytical grade. FT-IR spectra of the composites were analyzed on a Perkin Elmer 16F PC FT-IR spectrometer within 4000-500 cm⁻¹ wavenumber region. Solid-state ¹³C-NMR spectra were taken using a Bruker WB-400 spectrometer with a spinning rate of 10 KHz. Elemental analysis was done on a Perkin-Elmer Elemental Analyzer series II Model 2400. Powder X-ray diffraction pattern of crystal nature was recorded using a Rigaku Miniflex II Desktop X-ray Diffractometer with 3° and stop angle of 70°, sampling step size of 0.03, scan speed of 3.00, 30 KV and 15 mA. Inductively Coupled Plasma Mass Spectroscopy (ICP-M S) analyses of wastewater before and after treatment with composites were done using an ICP-M S X Series-II (Thermo Scientific).

Example 1

Materials and Methods

Pyrrole (PY), 1,2-Diaminoethane (ED), 1,4-Diaminobutane (BD), 1,8-Diamineoctane (OD), 1,10-Diaminodecane (DD), paraformaldehyde, heptane, carbon disulfide (CS₂), potassium hydroxide, acetone, dimethylformamide (DMF) were used as received without purification. Solvents and other chemicals used were of analytical grade. Elemental analysis was done using a Perkin-Elmer Elemental Analyzer series II Model 2400. FT-IR spectra recorded on a Perkin Elmer 16F PC FTIR spectrometer. Solid-state ¹³C-NMR spectra were taken using Bruker WB-400 spectrometer with a spinning rate of 10 KHz Thermogravimetric analysis (TGA) was performed using a thermal analyzer (STA 429) by Netzsch (Germany). Powder X-ray Diffraction pattern for crystal nature was recorded using Rigaku Miniflex II Desktop X-ray Diffractometer from Theta=5-50. Concentration of metal ions before and after adsorption where measured by inductively coupled plasma (ICP-MS).