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  • 1970-1974  (9)
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial and engineering chemistry 9 (1970), S. 314-318 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 30 (1974), S. 2053-2055 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 30 (1974), S. 687-690 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 11 (1973), S. 2547-2556 
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Kinetics of grafting reactions of styrene to preirradiated cellulose acetate have been studied by labeling the active sites with bromine atoms. The dilution of styrene monomer with methanol affected grafting reactions remarkedly: e.g., as the concentration of methanol in monomer solutions increased, the growth rates of individual graft radicals decreased while the average lifetimes increased. The integrated amounts of active sites which participated in grafting reactions were also affected by the constitution of monomer solutions and varied roughly in proportion to the extents of swelling of cellulose acetate. Grafting yields for styrene/methanol = 1/1 were higher than for 3/1 and 1/3 throughout the duration of grafting reactions, which is due not only to the high molecular weight of graft chains but also to the large number of graft chains for the 1/1 system compared to the other systems.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 11 (1973), S. 1213-1224 
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthetic details of solution polymerization in benzene and bulk polymerization of vinylferrocene are reported. In benzene solutions, with azobisisobutyronitrile (AIBN) as the initiator, small yields of low-polydispersity low molecular weight (M̄n ≃ 5000) polyvinylferrocene is obtained. However, high yields can be obtained by continuous or multiple AIBN addition. Higher molecular weight polymers and binodal polymers can be obtained as the monomer concentration is increased. In bulk polymerizations, yields of 80% can be obtained. The molecular weight increases as temperature decreases from 80 to 60°C in bulk polymerizations, and an increasing amount of insoluble polymer results. The soluble portion is often binodal, the higher molecular weight node consisting of an increasingly branched structure. Lower molecular weight polymer was readily fractionated into narrow fractions from benzene-methanol systems, but higher molecular weight polymer proved impossible to fractionate into narrow fractions due to branching.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 12 (1974), S. 1581-1581 
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 396 (1973), S. 319-327 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Phosphidation of Nickel by Phosphorus TrichlorideThe phosphidation of nickel sheets by phosphorus trichloride vapor of 30 and 50 Torr has been studied kinetically by gravimetric means in the temperature range of 400-650°C in hydrogen atmosphere. The phosphidation proceeded generally according to the parabolic rate law. The parabolic rate constant increased with an increase of temperature, and its temperature dependence yielded the activation energies of about 33 and 47 kcal/mole for 400-550 and 550-650°C, respectively. X-ray and electron microprobe analyses showed that surfaces of the specimens phosphidized are made up of mixtures of Ni2P and Ni6P5, and that at the phosphide/metal interface the compound Ni2P is formed. The experiments using argon as carrier gas resulted in the formation of both the phosphides and the chlorides, and this fact could be explained in terms of thermodynamics.
    Notes: Die durch Phosphortrichloriddämpfe von 30 sowie 50 Torr bewirkte Phosphidierung von Nickelblechen wird im Temperaturbereich von 400-650°C in Wasserstoffatmosphäre kinetisch mittels gewichtsanalytischer Bestimmung untersucht. Die Phosphidierung verläuft im allgemeinen nach dem parabolischen Geschwindigkeitsgesetz. Die entsprechende Geschwindigkeitskonstante steigt mit zunehmender Temperatur, und ihre Temperaturabhängigkeit ergibt die Aktivierungsenergien von rund 33 und 47 kcal/Mol für 400-550 bzw. 550-650°C. Röntgenbeugungsbilder und röntgenmikroanalytische Untersuchungen zeigen, daß die Oberflächen der phosphidierten Proben aus Mischungen von Ni2P und Ni6P5 bestehen, und daß sich an der Grenzfläche Phosphid/Metall die Verbindung Ni2P gebildet hat. Versuche mit Argon als Trägergas führen zur Bildung der Phosphide und Chloride, was thermodynamisch erklärt wird.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-1: Polymer Chemistry 10 (1972), S. 3503-3508 
    ISSN: 0449-296X
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Copolymers of phenylvinylene carbonate with styrene and p-chlorostyrene are readily prepared with radical initiators. The carbonate portion of the copolymers has been hydrolyzed to a 1,2-glycol which was then oxididatively cleaved with periodate-perman-ganate to produce a polymer with carboxyl and keto endgroups. Block copolymers were then prepared by conversion of the carboxyl groups to an acid chloride, followed by coupling with diols or a diamine.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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