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  • 1
    Electronic Resource
    Electronic Resource
    Contribution à l'étude des propriétés électriques et mécaniques dynamiques de quelques polyéthylènes chlorés à saturation (1973)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 171 (1973), S. 229-242 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Electric properties of suspension chlorinated polyethylenes (chlorine content about 73%) are investigated at the frequency of 5 MHz, within the temperature range from 20 to 80°C. The observed relaxations are dependent on the chemical structure of the polymer.In addition, dynamic mechanical properties are studied within a temperature range of -100 to +190°C. No parallelism is noticed between electrical and mechanical properties for this rigid-chain polymer.
    Notes: Les propriétés électriques de polyéthylènes chlorés en suspension (taux de chlore, 73% environ) ont été étudiées à la fréquence de 5 MHz dans une gamme de température de 20 à 80°C. Les relaxations observées varient avec la structure chimique du polymère.Les propriétés mécaniques dynamiques ont été étudiées en basse fréquence dans une gamme de température de -100 à +190°C. On n'observe pas de parallélisme entre propriétés électriques et mécaniques pour ces polymères dont les chaînes sont très rigides.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1973.021710121
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  • 2
    Electronic Resource
    Electronic Resource
    Production of organometallic polymers by the interfacial technique. XXV. Synthesis of oligomeric silylhydrazines (1972)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 160 (1972), S. 251-258 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Durch Grenzflächenpolykondensation von Silanen mit Hydrazinen wurden Polymere der Struktur I hergestellt. Dabei kam ein modifiziertes wasserfreies Lösungsmittelsystem aus Acetonitril und Kohlenwasserstoffen zur Anwendung.Die Produkte haben nur niedrige Molekulargewichte. Eine Zuordnung der IR-Banden wird gegeben.
    Notes: Polymers of the form below were prepared by the interfacial method via the condensation of silanes with hydrazines employing a modified nonaqueous system using acetonitrile and liquid hydrocarbons. IR frequency band assignments are given. The products are oligomeric.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1972.021600119
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  • 3
    Electronic Resource
    Electronic Resource
    Synthesis of poly-O-acyl-amideoximes containing group IV A metals from poly(acrylonitrile) (1972)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 152 (1972), S. 43-47 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Durch Umsetzung von Polyacrylnitril mit Hydroxylamin und dann mit Organometallhalogeniden von Sn, Ge oder Si wurden modifizierte Polymere erhalten, die wahrscheinlich folgende Struktur aufweisen: Mit Cl2MR2 entstehen vernetzte Produkte. Die neuen Polymeren werden kurz charakterisiert.
    Notes: Poly(acrylonitrile) was modified to give products of the form below via reaction with hydroxylamine and subsequently with group IV organometallic reactants: The products obtained with Cl2MR2 are crosslinked. Properties of the new polymers are briefly characterized.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1972.021520106
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  • 4
    Electronic Resource
    Electronic Resource
    Modification of poly(acrylonitrile) via reaction with ti, zr, and hf dicyclopentadiene dichloridesPortions presented at the 162nd National American Chemical Society meeting in Washington, D. C. (1972)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 25 (1972), S. 121-129 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Modifizierung von Polyacrylnitril wurde durch Bildung von Polyacrylamidoxim und nachfolgende Kondensation mit Ti-, Zr- und Hf-Verbindungen durch Anwendung der Grenzflächentechnik erzielt.Die thermischen Eigenschaften dieser Produkte werden angegeben. Der anfänglich bei 200 bis 350 °C erfolgende Abbau verläuft wahrscheinlich über cyclische Produkte, während der Abbau oberhalb 500°C in Luft durch Oxydation des verbliebenen Produktes erfolgt.
    Notes: The modification of poly(acrylonitrile) was effected via formation of poly(acrylamideoxime) followed by condensation with Ti, Zr and Hf compounds. Modification was effected utilizing generally the interfacial technique.Thermal properties are reported. Initial degradation in the 200 to 350°C region probably occurs via the formation of cyclic products whereas at temperatures 〉500°C degradation in air occurs via oxidation of the remaining product.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1972.050250112
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  • 5
    Electronic Resource
    Electronic Resource
    Molding polycarbonate: Moisture degradation effect on physical and chemical properties (1974)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 14 (1974), S. 817-822 
    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: Proper drying techniques prior to molding can eliminate the overall effects of moisture on the physicochemical properties of polycarbonate. Problems associated with moisture in polycarbonate during molding are described in detail. Moisture absorption is very rapid with the maximum allowable moisture content of 0.03 percent reached within 30 minutes at 49 percent RH and 75°F. Molding with excess moisture content causes a chemical and physical degradation resulting in reduction in tensile impact strength, tensile elongation, ultimate tensile strength, proportional limit and molecular weight. New and existing techniques and procedures for degradation detection were investigated, such as intrinsic viscosity, infrared spectrometry, and thermal methods of analysis. Gel permeation chromatography (GPC) proved the most satisfactory. GPC provided information on the average molecular weight and polydispersity.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760141202
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  • 6
    Electronic Resource
    Electronic Resource
    Positive and negative photoresist applications of thin films surface-photopolymerized from hexachlorobutadiene (1972)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 12 (1972), S. 209-212 
    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: Polymeric films deposited from the vapor of C4Cl6 by the surface-photopolymerization technique are electrically and mechanically continuous on various substrates when very thin. The thickness of the films depends upon irradiation time with wavelengths in the region 2000-3000Å. Re-irradiation in oxygen (air) of the polymeric films with light of these low wavelengths leads to patterned removal of the films. Since films 500Å thick and less can resist etchants for various substrates, a new and extremely thin positive photoresist system is possible. Resolution of etched substrates to lines a few microns wide has been demonstrated. If the polymeric films from C4Cl6 are deposited from the monomeric vapor at lower substrate temperatures they are soluble in various solvents. Re-irradiation with UV light with the films in vacuum produces a patterned fixing of the polymer with respect to acetone. A negative photoresist system is therefore possible. Again, films of thickness 500Å and less can resist various etchants such that substrates can be etched to high resolution.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760120309
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  • 7
    Electronic Resource
    Electronic Resource
    Quantitative analysis with an energy-dispersive detector using a pulsed electron probe and active signal filtering (1974)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 3 (1974), S. 153-158 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The pulsed beam technique has been used to achieved a high data acuumulation rate in an energy-dispersive analytical system consisting of an electron probe analyser and the Harwell ‘Highspec’ pulse analyser system 3074. The use of fast beam switching ( ∼ 30 ns transient time) and the special timing facilities available in the Harwell equipment reduce the spectrum contamination due to displacement of the probe during switching to a low level and also provide precise measurements of live time, essential for accurate analysis. Analyses performed at spectrum accumulation rate of up to 12 kP.P.S. shows agreement with accepted values to within ± 1% for major constituents. Simple modification of the system permits accumulation rates up to 25 kP.P.S.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300030407
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  • 8
    Electronic Resource
    Electronic Resource
    Cyclopentadienyltitanium trichloride - alkyl aluminum chloride catalysts for ethylene polymerization (1960)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 45 (1960), S. 250-251 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1960.1204514534
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  • 9
    Electronic Resource
    Electronic Resource
    The concentration-dependent diffusion of styrene in ethyl cellulosePresented at the 138th Meeting of the American Chemical Society, New York, N. Y., September 11-16, 1960. (1962)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 56 (1962), S. 57-68 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The diffusion of styrene vapor in ethyl cellulose film has been studied as a function of styrene solubility in the film at 50°C. Methods and data are presented for determining the equilibrium solubility of styrene in ethyl cellulose as a function of vapor pressure at 50°C. The permeation rates of styrene vapor through 3-mil film were determined under steady state conditions for various pressures of pure styrene vapor on one side of the film and vacuum on the other side. From a plot of permeation rates versus styrene solubility the diffusion coefficient was calculated as a function of concentration. Measurements made over a concentration range of 0 to 0.7 g. styrene/cm.3 of unswollen film show that the diffusion coefficient first increases rapidly with concentration, then goes through a maximum, and finally levels off at 10-7 cm.2/sec. In the limited range of 0.06 to 0.10 g./cm.3 the diffusion coefficient varies exponentially with concentration as has been reported for other systems in a similar range. However, such a functionality does not represent the present system over a broad concentration range. These results, if generally applicable to other systems, indicate that the nature of the diffusion process for organic vapors in polymers may be considerably more complicated than formerly supposed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1962.1205616307
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  • 10
    Electronic Resource
    Electronic Resource
    A Raman spectroscopic study of the ferroelectric phase transition in K2SeO4 (1974)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 2 (1974), S. 629-633 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    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/jrs.1250020610
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