... curing of ca 400 J/g, and onset and peak temperatures of This paper describes a single-step synthesis of the lowest approximately ...

made with modified nanotubes and thermoplas- and the nanotubes could be ether, thioether, amine, salt tude Of variations in the structure Of the polymer ...

Singlet carbon atoms react with cyclic ethers to give carbon monoxide and diradical species. Cyclic thioethers react with singlet carbon atoms to give carbon monosulfide (CS) and diradicals. While both deoxygenations and desulfurization are facile process...

Bis(vinylbenzyl)ether (BVE) and bis(vinylbenzyl)thioether (BVT) have been synthesized from vinylbenzyl chloride in yields greater than 90%. The onset/peak temperatures for thermal cure observed by first-run DSC scans were 80 deg C/11O deg C and 120 deg C/...

The effect of modifying Thiokol polysulfide prepolymers with dimercapto diethyl ether and dimercapto diethyl sulfide, on the resistance to heat ageing has been examined together with a commercially modified (PR-1770 B-2) and an unmodified equivalent seala...

The general principles of classical liquid chromatography and high pressure liquid chromatography (HPLC) are reviewed, and their advantages and disadvantages are compared. Several chromatographic techniques are reviewed, and the analytical separation of a...

The vacuum ultraviolet absorption (from 220 to 120 nm) and photoelectron (from 6 to 21 eV) spectra of the following molecules are compared: tetrahydropyran, tetrahydrothiopyran, methylvinylether, methylvinylthioether, dihydropyran, and 4,4-dimethyl-2,3-dihydrothiopyran. The great similarity between the photoelectron spectra of related ethers and thioethers ...

Biobased additives are desirable commodities due to their eco-friendly nature. These additives can demonstrate physical and chemical properties comparable to those of conventional mineral oil based products. Sulfur incorporated triacylglycerol can function as an antiwear/antifriction additive for ...

... IR spectroscopic evidence showed that the thermal curing of BVE occurred mostly ... tan bma 1 ... Figure 7. TGA analysis (heating rate of 10°C/min in air ...

The general principles of classical liquid chromatography and high pressure liquid chromatography (HPLC) are reviewed, and their advantages and disadvantages are compared. Several chromatographic techniques are reviewed, and the analytical separation of a C-ether liquid lubricant by each technique is illustrated. A practical application of HPLC is then demonstrated by ...

Bio-based additives are desirable commodities due to their eco-friendly nature. These additives can demonstrate physical and chemical properties comparable to those of conventional mineral oil-based products. Sulfur incorporated triacylglycerol can function as an antiwear/antifriction additive for lubricants. The synthesis of four useful hydroxy thio-ether derivatives of ...

A novel reaction of indole with aryldiazonium salts leading to the formation of 2-aryl-3-(arylazo)indoles was discovered. The products were found to possess potent anti-MRSA and anti-LLVRE activities. The SAR studies indicate that the potentially metabolically labile azo functionality can be replaced with ether oxygen and thioether sulfur atoms without any ...

The development and testing of a new concept for oil identification this past year made possible the successful application of gas chromatography to the analysis and identification of asphalts. Through the use of electron capture detection--gas chromatography, the passively labeled perfluorobenzyl thioethers and ethers which are derivatives of weak acids ...

The synthesis and structures of acyclic and macrocyclic thio-, seleno- and telluro-ether complexes of the metallic and metalloid elements of Groups 13-16 reported since 2000 are described. The diverse structures range from discrete monomers through to infinite 1-, 2- or 3-D polymers. The coordination chemistry in this area is quite different to familiar d-block chemistry and ...

Properties of condensation polymers can be modified without any of the disadvantages of inert fillers. copolymerization, or coatings by contacting with an organic modifier and subjecting to irradiation. Such modifiers may be alcohols, ethers, mercaptans, thioethers, disulfides, amines, amides, halides, unsaturated compounds, dyes, or polyethers. ...

A stable aqueous suspension of a polymer of an olefin of 2 to 6 carbon atoms is made by dispersing polymer particles of a size in the range of 0.001 to 2 mu in a concentration in the range of 0.001 to 5% by wt of the suspension in water or brine with the aid of a nonionic surfactant in solution in a concentration in the range of 0.001 to 5% by wt of the solution, the surfactant being a ...

A selectively protected carbasugar analogue of ?-galactofuranose was synthesised from glucose using ring-closing metathesis as the key step. The carbasugar was converted into an ?-galacto configured 1,2-epoxide, which was an effective electrophile in Lewis acid catalysed coupling reactions with alcohols. The epoxide was opened with regioselective attack at C-1 to give ?-galacto configured C-1 ...

The mol-ecular structure of the title compound, C(18)H(23)N(3)S, shows it to be a derivative of an amino-thio-phenol possessing a tetra-methyl-guanidine group with a localized C=N double bond of 1.304?(2)?� and a protected thiol functional group as an S-benzyl thio-ether. The two aromatic ring planes make a dihedral angle of 67.69?(6)�. PMID:21754503

In the title compound, C(16)H(12)N(2)S(3), the two benzothia-zole groups are oriented differently with respect to the -CH(2)- groups, one being approximately staggered and one nearly eclipsed. A sulfur-? inter-action of 3.3627?(11)?� is observed between the bridging thio-ether S atom and a thia-zole ring. The crystal packing is further stabilized by inter-molecular C-H?N and ...

... Pagination or Media Count : 43. ... the properties of new fluoromethyl thioethers and to compare their properties with those of the chlorine analogues. ...

Based on the above described differences in the reactivity of intercluster linkages, an effective new procedure for low-temperature coal depolymerization-liquefaction was proposed and initially examined in our laboratory and then further developed in the framework of this project. The pre-extraction with THF removes most of the easily extractable material within the coal network, leaving the ...

The thiols in the morning urine of 224 employees of a chemical plant were determined after alkaline hydrolysis of all urinary thioethers. The highest thioether excretion was found in rubber workers and radial tyre builders in comparison with clerks, plastic monomer mixers and footwear preparers. Smoking and medication tended to increase ...