thermogravimetric analysis

Wood Sawdust Plus Silylated Styrene Composites with Low Water Absorption

Ecologically friendly composites have been made on the basis of wood sawdust and sillylated styrene as the binder. That binder acts simultaneously as a reinforcing agent. The surface structures were studied by a scanning electron microscopy and energy dispersive X-ray microanalysis. The bending strength increases with the increase in temperature from 453 to 493 K at the constant pressure of 15 MPa.

Synthesis, Characterization and Biological Activity of Mixed Ligand (Imine of Benzidine and 1,10-Phenanthroline) Complexes with Fe(II), Co(II), Ni(II) and Cu(II) Ions

In this paper, binuclear metal complexes of the metal ions Fe(II), Co(II), Ni(II) and Cu(II) were synthesized by the reaction of the primary ligand (imine of benzidine) (H2L) and the secondary ligand (1,10-phenanthroline) (L`) with these metal ions in a molar ratio of 1:2:2, respectively. The complexes were characterized using CHN elemental analysis, FT-IR, UV-Vis, magnetic susceptibility, molar conductivity, 1H NMR, and TGA-DTA thermogravimetric analysis.

Synthesis of Epoxyperoxides and Peroxide Derivatives of α-D-Galactopyranose Based Thereon

New epoxide-containing peroxides have been synthesized via the interaction between epichlorohydrin and ditertiary ω-hydroxyalkyl peroxides. The effect of reaction conditions on both the yield and composition of the reaction products has been established.

Термічна стійкість та технологічні властивості полімервмісних мастильно-охолоджувальних рідин

The thermal resistance of coolant-lubricant liquid samples made on the basis of “Gala” washing liquid was studied with the help of the derivatrography method. The effect of polymer additives on their thermal resistance and penetrating and washing properties was determined. Методом дериватографії досліджено термічну стійкість зразків мастильно-охолоджу- вальних рідин, приготовлених на основі миючого засобу “Gala”. Виявлено вплив полімерних добавок МОР на їх термічну стійкість та проникаючі і миючі властивості. 

Combustion Properties of Several Species of Wood

Six species of wood were studied by combined thermogravimetric and differential thermal analysis (TG/DTA) so as to evaluate their combustion properties in terms of the amount of energy released, the initial temperature of ignition, and the cleanness of burning. Pinus monticola, Acer saccharum, Quercus rubra, Diospyrus spp., Tabebuia spp. and Guaiacum spp. were chosen to provide a wide range of hardness values and densities. Quercus rubra burned to the hottest temperature of the samples, and also left the least amount of ash behind. For Guaiacum spp.