Schnell

The values of raw materials and products can be found in trade journals such as Chemical Marketing Reporter (Schnell Publishing Company) and European Chemical News (Reed Business Publishing... 

Chemical Profiles Phosphoms," Chemical Marketing Reporter, Schnell Publishing Co., Inc, New York, 1964—1995. 

Pore diffusion limitation was studied on a very porous catalyst at the operating conditions of a commercial reactor. The aim of the experiments was to measure the effective diffiisivity in the porous catalyst and the mass transfer coefficient at operating conditions. Few experimental results were published before 1970, but some important mathematical analyses had already been presented. Publications of Clements and Schnelle (1963) and Turner (1967) gave some advice. 

Crystallisable polymers have also been prepared from diphenylol compounds containing sulphur or oxygen atoms or both between the aromatic rings. Of these the polycarbonates from di-(4-hydroxyphenyl)ether and from di-(4-hydroxy-phenyl)sulphide crystallise sufficiently to form opaque products. Both materials are insoluble in the usual solvents. The diphenyl sulphide polymer also has excellent resistance to hydrolysing agents and very low water absorption. Schnell" quotes a water absorption of only 0.09% for a sample at 90% relative humidity and 250°C. Both the sulphide and ether polymers have melting ranges of about 220-240°C. The di-(4-hydroxyphenyl)sulphoxide and the di-(4-hydroxy-phenyl)sulphone yield hydrolysable polymers but whereas the polymer from the former is soluble in common solvents the latter is insoluble. 

SCHNELL, H., Chemistij and Physics of Polycarbonates, Interscience, New York (1964)... 

The toughness of interfaces between immiscible amorphous polymers without any coupling agent has been the subject of a number of recent studies [15-18]. The width of a polymer/polymer interface is known to be controlled by the Flory-Huggins interaction parameter x between the two polymers. The value of x between a random copolymer and a homopolymer can be adjusted by changing the copolymer composition, so the main experimental protocol has been to measure the interface toughness between a copolymer and a homopolymer as a function of copolymer composition. In addition, the interface width has been measured by neutron reflection. Four different experimental systems have been used, all containing styrene. Schnell et al. studied PS joined to random copolymers of styrene with bromostyrene and styrene with paramethyl styrene [17,18]. Benkoski et al. joined polystyrene to a random copolymer of styrene with vinyl pyridine (PS/PS-r-PVP) [16], whilst Brown joined PMMA to a random copolymer of styrene with methacrylate (PMMA/PS-r-PMMA) [15]. The results of the latter study are shown in Fig. 9. 

Schnell, R., Stamm, M. and Creton, C., Direct correlation between interfacial width and adhesion in glassy polymers. Macromolecules, 31, 2284-2292 (1998). 

Schneise,/. path, lane, track, course, schnell, a. fast, rapid, quick, sudden. — adv. quickly, rapidly, -abbindend, a. quick-set-ting. 

Schnell-analyse, /. rapid analysis, -arbelts-stahl, m. high-speed steel, -aufldser, m. 

Schnell-gang, m. rapid motion, high speed, -garung, /. quick (or accelerated) fermentation,... 

Diboran wird in Wasser schnell und quantitativ zu Borsaure hydrolysiert, wahrend sich in Alkalilauge auch Alkalimetall-boranat bildet8. 

Das stark hygroskopische Lithiumboranat (98%ig im Handel) zersetzt sich schnell an der Luft. Unter AusschluB von Feuchtigkeit und unter Inertgas bleibt es lange un verandert... 

Es zersetzt sich in eiskaltem Wasser langsam, in Methanol dagegen schnell. Die Loslichkeit von Natrium-tri-methoxy-hydrido-borat (g/100 g Solvens) betriigt in ... 

Isopino-campheyl-borane reagieren besonders mit m-Alkenen mit mitlelstandiger Doppclbindung und mit m-Cycloalkcncn schnell und stereoselektiv unter Bildung optisch aktiver Organoborane, die verschie-dene asymmetrische Synthesen ermoglichen. 

Diboran reduziert Monocarbonsauren in THF oder 1,2-Dimethoxy-athan, mit dem Losungsmittel als Boran koordiniert, in zwei Schritten. Zuerst wird bei -20° schnell und quantitativ Triacyloxy-boran gebildet, im zweiten langsameren Schritt (25°, 1 Stde.) Trialkoxy-boroxol, das nach Hydrolyse den gewiinschten Alkohol liefert4. 

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