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  • 1
    Electronic Resource
    Electronic Resource
    Effect of container diameter on β-radiation-induced polymerization of acrylamide (1981)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 26 (1981), S. 1105-1115 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    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: Beta particles emitted by radioactive nuclei have a finite depth of penetration in a given medium and hence a certain linear energy transfer value depending upon their initial energy. This property can be utilized to achieve different rates of radiation induced reactions. Various diameter capillaries containing saline solutions of acrylamide and radioactive phosphorus-32 were used in the experiment and the change in viscosity of acrylamide solution was used as an indicator of the amount of energy transferred. Distinctly different rates were observed which were roughly proportional to the diameters of the capillaries containing the solutions. It also appears that irradiation of the polymer solution at 80°C even in the absence of oxygen has an adverse effect on the viscosity. The experimental conditions were chosen to approximate those existing in oil reservoirs.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1981.070260404
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  • 2
    Electronic Resource
    Electronic Resource
    Novel Nitrido- and Oxo(phthalocyaninato) Complexes of Molybdenum, Tungsten and Rhenium (2000)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 2000 (2000), S. 1025-1030 
    Details
    ISSN: 1434-1948
    Keywords: Phthalocyanines ; Nitrides ; Oxo complexes ; Rhenium ; Molybdenum ; Tungsten ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthesis of new nitrido(phthalocyaninato)molybdenum (1-4) and -tungsten complexes (5-7) starting from the corresponding phthalonitriles and MNCl3 (M = Mo, W) is reported. In addition, the reaction of (tBu4Pc)WN (6) with PPh3 leading, after several steps, to the diamagnetic compound (tBu4Pc)WO (7) is described. The reaction of (tBu4Pc)ReN (9) with PPh3 leads to [(tBu4Pc)ReO]2 (12), and of [(C5H11)8Pc]ReN (10) with PPh3 leads, under different conditions, to {[(C5H11)8Pc]ReO}2O (11).
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of zinc diisopropyl dithiophosphate on the photooxidative degradation of poly(2,6-dimethyl-1,4-phenylene oxide) films (1983)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 34 (1983), S. 216-218 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Der Einfluß von Zink-diisopropyl-dithiophosphat (ZnDTP) auf den photostabilisierten Abbau von Filmen aus Poly(2,6-dimethyl-1,4-phenylen-oxid) wurde im Konzentrationsbereich 0,1 bis 1,0 Masse-% untersucht. Der Abbau des Polymers hängt deutlich von der Konzentration des ZnDTP ab, das bei allen Konzentrationen als Photostabilisator wirkte.
    Notes: The effect of zinc diisopropyl dithiophosphate (ZnDTP) chelate over the range of 0.1 to 1.0 wt.% on the photostabilized degradation of poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) films was examined. The degradation of the polymer was remarkably affected by the concentration of the ZnDTP which acted as photostabilizer at all concentrations.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1983.010340407
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  • 4
    Electronic Resource
    Electronic Resource
    Synthese von Oligobutadienen durch radikalische Substanzpolymerisation (1983)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 34 (1983), S. 637-639 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Telechelic butadiene oligomers were prepared by bulk polymerization with nitril- and xanthogenate terminal groups and average molecular weight 〈 5000 g/mol. 2.2'-Azo-bis-iso-butyronitril (AIBN) and xanthogenate disulfides being used as initiator and chain transfer agents, respectively. The average molecular weight and the nitril functionalities of the oligomers were decreased and the xanthogenate functionality was increased by the application of chain transfering agents. Synthesis and characterization of the oligomers are described.
    Notes: Telechele Butadienoligomere werden in Substanzpolymerisation mit Nitril- und Xanthogenatendgruppen unter Verwendung von 2,2'-Azo-bis-isobutyronitril (AIBN) als Initiator und Dialkylxanthogendisulfiden als Kettenüberträger hergestellt. Die relativen mittleren Molmassen liegen unter 5000 g/mol. Die mittlere Molmasse und die Nitrilfunktionalität der Oligomere sinken, die Xanthogenatfunktionalität steigt bei Einsatz von Kettenüberträgern. Die Synthese und Charakterisierung der Präpolymere werden beschrieben.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1983.010341008
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  • 5
    Electronic Resource
    Electronic Resource
    Bestimmung der Übertragungskonstanten von Di-alkyl-xanthogen-disulfiden bei der radikalischen Substanzpolymerisation von Butadien (1984)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 35 (1984), S. 58-60 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: According to MAYO and SMITH, the chain transfer constants of dialkyl xanthogendisulfides with different alkyl substituents were investigated in the bulk polymerization of butadiene. Contrarily to emulsion polymerization, the chain transfer constants are independent of the alkyl groups. By ESR measurements no difference in the stability of the radicals was found. The values of retardation of polymerization rate were compared with those of emulsion polymerization.
    Notes: Die Übertragungskonstanten nach MAYO und nach SMITH für Di-alkyl-xanthogendisulfide mit unterschiedlichen Alkylsubstituenten bei der Substanzpolymerisation von Butadien wurden bestimmt. Im Gegensatz zur Emulsionspolymerisation wurde gefunden, daß die Übertragungskonstanten unabhängig vom Alkylgruppenrest sind. ESR-Messungen zeigten ebenfalls keine Unterschiede in der Radikalstabilität. Die Retardierung der Polymerisationsgeschwindigkeit wurde mit Werten aus der Emulsionspolymerisation verglichen.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1984.010350113
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  • 6
    Electronic Resource
    Electronic Resource
    Stability and Polymerization of uranyl-catechol chelates (1968)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 280-288 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Interaction of uranyl ions with catechol has been investigated by the potentiometric and spectrophotometric techniques. Potentiometric titrations of uranyl nitrate with caustic potash in presence of catechol exhibited a sharp inflexion at 2⅔ moles of alkali der mole of the metal ion. At the initial stages of the titration, the reaction was shown to proceed as: \documentclass{article}\pagestyle{empty}\begin{document}$$ \rm{UO}_2^{2 + } + \rm{C}_6 \rm{H}_4 \left({\rm{OH}} \right)_2 \rightleftharpoons \rm{UO}_2 \rm{C}_6 \rm{H}_4 \rm{O}_2 + 2\rm{H}^ + . $$\end{document} The equilibrium constant of the reaction was found to be 2.88 · 10-7 giving a value of 3.87·1014 for the formation constant of the chelate. Equilibrium constant of the reaction: \documentclass{article}\pagestyle{empty}\begin{document}$$ \rm{2UO}_2^{2 + } + 2\rm{H}_2 \rm{A} \rightleftharpoons \left({\rm{UO}_2 \rm{A}_2 } \right)_{\rm2} + 4\rm{H}^ + . $$\end{document} has been found to be 1.00·10-10. The binuclear chelate species have been found to polymerize further through hydrolytic reactions.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19680380507
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  • 7
    Electronic Resource
    Electronic Resource
    Electron spin resonance study of radical formation in nylon 66 fibers upon washing and drying (1969)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 130 (1969), S. 261-265 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1969.021300118
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  • 8
    Electronic Resource
    Electronic Resource
    Electron spin resonance spectrum of gamma irradiated polystyrene (1969)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Letters 7 (1969), S. 587-590 
    Details
    ISSN: 0449-2986
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1969.110070805
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  • 9
    Electronic Resource
    Electronic Resource
    Measurement of the thermal conductivity of polymer composites to high temperatures using the line source technique (1983)
    Brookfield, Conn. : Wiley-Blackwell
    Polymer Composites 4 (1983), S. 219-224 
    Details
    ISSN: 0272-8397
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The line source technique for determination of thermal conductivity has been modified to allow measurement to higher temperatures than previously attained. This required the addition of a high-temperature tube furnace to the standard experimental equipment. The modified device was used to measure the temperature-dependent thermal conductivities of a glass- and talc-filled phenol-formaldehyde(phenolic) resin and a glass- and fiberglass-filled acrylonitrile-butadiene (AB) copolymer. Thermal conductivities of the virgin material were measured from room temperature to the onset of thermal decomposition. The char material thermal conductivities were measured from room temperature to approximately 900°C. A least-squares fit of the data yielded a linear-curve fit for the virgin material and a third-order fit for the char material.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pc.750040405
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  • 10
    Electronic Resource
    Electronic Resource
    Rotational isomers of ethyl dithioacetate and ethyl thionoacetate: A Raman studyNRCC Publication No. 19494. (1981)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 11 (1981), S. 390-392 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Raman spectra of ethyl dithioacetate (CH3CS2C2H5) and ethyl thionoacetate (CH3C(=S)OC2H5) have been measured as a function of temperature in the liquid phase and in the solid phase at low temperature. For both compounds disappearance of several bands from the liquid spectrum on solidification established the presence of more than one conformer in the liquid phase. Temperature variation studies on band pairs whose components belong to different isomers gave enthalpy differences of 598±48 cal mol-1 and 1072±65 cal mol-1 between the conformers of CH3CS2C2H5 and CH3C(=S)OC2H5 respectively. The most probable low-energy conformer, in both instances, is the s-cis form with all the heavy atoms contained in a single plane.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250110518
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