SYNTHESIS AND CHARACTERIZATION OF MONOVALENT AND MIXED-VALENCE COMPLEXES OF COPPER WITH 2-THIOURACIL

Five polynuclear monovalent and mixed-valence complexes of copper with 2-thiouracil were synthesized. They were characterized by the molar conductivity, electromc spectra, infrared spectroscopy, thermogravimetric and magnetic susceptibility measurements. Their coordination properties and tentative structures were discussed.     

SYNTHESES AND CHARACTERIZATION OF A SERIES OF RARE EARTH BINUCLEAR COMPLEXES

A direct method of obtaining complexes of cobalt with respect to rare earth elements is reported. The total of 14 new compounds which are insoluble in water and general organic media have been synthesized by the reaction of RE(Ac)_3·XH_2O (RE=rare earth elements except for Ce, Pm; X=2, 5, 8) with [H_6CO_2(Gc)_5CS_2] (Gc=~-S_2CNHCH_2CO_2~-) in acetone/ water at room temperature. The complexes having the general formula, [RE_2Co_2(Gc)_5HAcCS_2·XH_2O], were characterized by elemental analyses, infrared spectra, DSC and TGA.     

SYNTHESIS AND PROPERTIES OF POLYURETHANE MODIFIED WITH AMINOETHYLAMINOPROPYL POLY(DIMETHYL SILOXANE)

Ｍｕｌｔｉｐｈａｓｅｓｅｇｍｅｎｔｅｄｓｉｌｏｘａｎｅｕｒｅｔｈａｎｅｃｏｐｏｌｙｍｅｒｓｈａｖｅｂｅｅｎｒｅｐｏｒｔｅｄｉｎｔｈｅｌｉｔｅｒａｔｕｒｅｗｈｉｃｈｗｅｒｅｐｒｅｐａｒｅｄｂｙｐｒｉｍａｒｙｏｒｓｅｃｏｎｄａｒｙａｍｉｎｅｔｅｒｍｉｎａｔｅｄｓｉｌｏｘａｎｅｏｌｉｇｏｍｅｒｓｗｉｔｈｄｉｉｓｏｃｙａｎａｔｅｓａｎｄｄｉｏｌｓ［１～６］．Ｈｏｗｅｖｅｒ，ｂｅｃａｕｓｅｏｆｔｈｅｉｎｔｒｏｄｕｃｔｉｏｎｏｆＰＤＭＳｉｎｔｏｔｈｅｍａｉｎｃｈａｉｎｏｆｐｏｌｙｕｒｅｔｈａｎｅ，ｔｈ…     

POLYMER/MONTMORILLONITE COMPLEXES: PREPARATION AND INTERACTIONS WITH ROSIN ACID

INTRODUCTIONPitch is hydrophobic organic material mainly composed of fatty acid, resin acid, and esters(1,2). It is well know that pitch can cause serious problems to both production efficiency and the quality of paper if it can not be controlled to a certain extent or removed from pulp and paper making system(3). Accordingly, many measures(4-8) have been taken to fight for pitch problems from dealing with raw materials(6),changing processing methods or parameters, to using chemicals(7,8) …