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  • Organic Chemistry  (587)
  • Chemical Engineering  (263)
  • 1980-1984  (546)
  • 1945-1949  (304)
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  • 1
    Electronic Resource
    Electronic Resource
    Enthalpy of hydrogen-containing hydrocarbon liquids (1982)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 28 (1982), S. 833-835 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The partial enthalpy of dissolved hydrogen in hydrocarbon liquids is derived from the fugacity correlation of Sebastian et al. and the results are presented in general equations. The partial enthalpy of the hydrocarbon solvent is found to be changed only insignificantly by the dissolved hydrogen from that of the pure liquid at the experimental conditions of up to 30 MPa in pressure.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690280521
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  • 2
    Electronic Resource
    Electronic Resource
    Kristallin-flüssige Heterocycloalkane. I. Synthese und Eigenschaften substituierter 1,3-Dioxane (1981)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 323 (1981), S. 902-913 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Liquid-crystalline Heterocycloalkanes. I. Synthesis and Properties of Substituted 1,3-DioxanesThe synthesis of 2,5-disubstituted 1,3-dioxanes is described, their melting and clearing points and their physical properties (dielectric anisotropy, viscosity, transition enthalpies, optical birefringence) are investigated. The cyano substituted 1,3-dioxans 5 and 7 are valuable materials for application in displays.
    Additional Material: 8 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19813230607
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  • 3
    Electronic Resource
    Electronic Resource
    Folgeprodukte halogenierter Aldehyde. XVII. Reaktionen des N-(1,2,2,2-Tetrachlorethyl)-trichloracetaldimins mit Alkoholen und Mercaptanen (1981)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 323 (1981), S. 972-978 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Derivatives of Halogenated Aldehydes. XVII. Reactions of N-(1,2,2,2-Tetrachloroethyl)trichloroacetaldimine with Alcohols and ThioalcoholsReactions of N-(1,2,2,2-tetrachloroethyl)trichloroacetaldimine 1 with methanol lead to 1,2,2,2-tetrachloroethyl-(2,2,2-trichloro-1-methoxyethyl)amine 2a, N-(2,2,2-trichloro-1-methoxyethyl)trichloroacetaldimine 3a and bis-(2,2,2-trichloro-1-methoxyethyl)amine 5. After the reaction of the aldimine 1 with ethanol or propanol only the N-(1-alkoxy-2,2,2,-trichloroethyl)trichloroacetaldimines 3b, c are isolated; with thioalcohols only the N-(1-alkylthio-2,2,2-trichloroethyl)-trichloroacetaldimines 4a-c are obtained. The aldimines 3a-c and 4b, c are decomposed on treatment with hydrochloric acid and an excess of an alcohol or thioalcohol to yield the amine hydrochlorides 6a-c, 7b, c, which are transformed into the amines 8a-c and 9b, c. From these amines the derivatives 10-15 are prepared.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19813230616
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  • 4
    Electronic Resource
    Electronic Resource
    Zur Reduktion von 1,3-Thiaziniumsalzen; Synthese von 6,6′-Bi-1,3-thiazinylen und 6,6′-Bi-1,3-thiazinylidenen (1981)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 323 (1981), S. 33-40 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: On the Reduction of 1,3-Thiazinium Salts; Synthesis of 6,6′-Bi-1,3-Thiazinyls and 6,6′-Bi-1,3-Thiazinylidenes1,3-Thiazinium perchlorates 1 are linked together in a reaction with zinc powder or at a cathode forming 6,6′-bi-1,3-thiazinyls 3. This reaction proceeds via radical intermediates 2. Evidence of the existence of the very short-lived radicals is given by means of ring-disk-voltammogrammes as well as by electrochemical luminescence excitation. The 6,6′-bi-1,3-thiazinyls 3 undergo the reverse fission at a platinum anode resulting in thiazinium salts 1, whereas the dehydrogenation by chloranile yields the violet 6,6′-bi-1,3-thiazinylidenes 6.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19813230106
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  • 5
    Electronic Resource
    Electronic Resource
    Über die Wirkung eines mit radioaktivem 35S indizierten 2-(p-Aminophenyl)-thiazols auf Kulturen von Tuberkelbazillen II (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1209-1213 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurde die von Tbc-Bakterien in synthetischen Nährlösungen, die ein mit 35S indiziertes p-Aminophenylthiazol enthalten, aufgenommene Menge von radioaktivem Schwefel in Abhängigkeit von der APT-Konzentration in der Nährlösung ermittelt. Die für eine wachstumshemmende Wirkung notwendige Aktivität der isolierten Bakterien wurde festgestellt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320407
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  • 6
    Electronic Resource
    Electronic Resource
    Zur Kenntnis von Thiazolidon-(2)-Derivaten (1947)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 30 (1947), S. 1336-1338 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19470300527
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  • 7
    Electronic Resource
    Electronic Resource
    Molten poly(methyl methacrylate) under electron irradiation: Studies of depropagation and chain scissionThis work is based on the D.Sc. Thesis of H. Ficke, Submitted to M.I.T. July 1977 entitled, “Depolymerization of Vinyl Polymers Under Conditions of Moderate Temperature and Ionizing Radiatation.” (1980)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 20 (1980), S. 1236-1241 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The degradation rates of free radical polymerized and syn-diotactic poly(methyl methacrylate) (PMMA) under electron radiation were explored at temperatures ranging from 225 to 325°C and at electron dose rates from 10,000 rads/min to 100,000 rads/min. Scission of bonds between main-chain atoms resulted in pairs of radical chain ends, of which some disportionated, thereby reducing polymer molecular weight without loss of volatile, while others proceeded to depropagate via the usual radical transfer, causing complete volatilization of the chain without significant change of molecular weight of the residual polymer. Electron irradiation at a dose rate of 100,000 rads/min produced a significant enhancement in the reaction, rate, and reduced the overall activation energy from 140 KJ/g-mole observed for thermally induced depropagation to a value of 75 KJ/g-mole observed during simultaneous irradiation and/thermal depropagation.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760201810
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  • 8
    Electronic Resource
    Electronic Resource
    The melting performance of single screw extruders (1981)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 21 (1981), S. 352-359 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A number of recent screw designs is analyzed for melting performance, using a simple analytical approach based on Tadmor's original work. The melting length for a screw with constant depth channel is used as reference. An ideal compression screw will have a melting length of one-half the melting length of the reference screw. The Maillefer melt separation principle is discussed. The Maillefer screw melts in 2/3 of the length of the reference screw. Screws by Barr, by Dray and Lawrence and by Kim are shown to approach the ideal compression screw. A new design screw, using ideal compression and multiple channels and having a very large screw pitch, is shown to be a considerably more efficient melting device than any of the other, screws discussed.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760210606
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  • 9
    Electronic Resource
    Electronic Resource
    A study of structural development in the high speed spinning of poly(ethylene terephthalate) (1983)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 23 (1983), S. 95-99 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: In recent years the spinning speeds of poly(ethylene terephthalate) (PET) fiber have increased to the point that significant structural development is being observed in the spun yarn. At even higher speeds significant crystallization has been obtained. Data characterizing these yarns will be presented and discussed showing the development of crystals and that the onset of this phenomena is related to the stress at the “freeze point.” The “freeze point” rises from around Tg at low speeds to the order of 200°C at high speeds. The spinline itself has been characterized by velocity and orientation profiles which show the crystallization process is extremely rapid, occurring over a few centimenters of the spinline.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760230208
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  • 10
    Electronic Resource
    Electronic Resource
    Dynamic mechanical and thermomechanical properties of silicone-polycarbonate block copolymers (1983)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 23 (1983), S. 439-445 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Representative random, alternating block copolymers of polydimethylsiloxane (PDMS) and bisphenol-A-polycarbonate (BPAPC) were studied by thermomechanical and dynamic mechanical techniques. Data on glass transition temperatures (Tg), heat-deflection temperatures (Td), Vicat softening temperatures (Ts), coefficients of linear expansion (α), stress-strain, and stress relaxation for four PDMS-BPAPC block co-polymers are presented. The effect of casting films from mixed n-hexane-methylene chloride solution on the thermomechanical and dynamic mechanical properties was also studied.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760230805
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