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  • 1
    Electronic Resource
    Electronic Resource
    Synthese verschiedener Oxincellulosen für spurenanalytische Anreicherungsverfahren (1989)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 170 (1989), S. 159-172 
    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: Some routes to synthetize covalently bound chelating groups as 8-hydroxyquinoline or 8-hydroxyquinoline-5-sulfonic acid to cellulose are given. The products show a capacity of 500-800 μmol/g, fast kinetics of exchange and good stability against the eluent. The apparent stability constant of the complexes with Zn2+ are around 2 · 105 mol-1 dm3.
    Notes: Es werden mehrere Synthesemöglichkeiten für die Herstellung von an Cellulose immobilisierten 8-Hydroxychinolin- und 8-Hydroxychinolin-5-sulfonsäure-Derivaten beschrieben, die zu einem Produkt mit einer Kapazität von 500-800 μmol/g, hoher Austauschgeschwindigkeit und guter Stabilität gegenüber dem Eluenten führen. Die scheinbare Komplexbildungskonstante der Oxincellulosen mit Zn2+ ist etwa 2 · 105 mol-1 dm3.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1989.051700112
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  • 2
    Electronic Resource
    Electronic Resource
    Studies in effect of γ-radiation on synthetic fibres-I (1969)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 6 (1969), S. 127-135 
    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: Es wurde die Einwirkung von γ-Strahlen auf Polyester- und Polyamid-Garn in verschiedenen Dosen in Gegenwart sowie unter Ausschluß von Luft untersucht. Die Veränderung in den Fasereigenschaften wie Schmelzpunkt, relative Viscosität, Festigkeit und Farbstoffaufnahme wurde ermittelt. Die in dieser Arbeit gefundenen Ergebnisse zeigen, daß - obwohl mit höheren Strahlungsdosen die Faserstoffe beschädigt wurden - es mit kontrollierter Bestrahlung jedoch möglich ist, einige Fasereigenschaften ohne wesentlichen Faserabbau zu verbessern.
    Notes: Polyester and polyamide yarns have been exposed to γ-rays with varying doses of irradiation, both in vacuum and in the presence of air. The changes in such properties of the polymers as melting point, relative viscosity, tensile strength, and dye absorption have been investigated. The results of the present study indicate that, though with higher doses there is degradation of the polymer, under controlled conditions certain desirable properties of the fibre are greatly improved without affecting the mechanical strength.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1969.050060112
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of γ-radiation on synthetic fibres-II irradiation in the presence of chemicals (1969)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 7 (1969), S. 85-100 
    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: Polyester- und Polyamid-Garn wurden in Gegenwart von Chemikalien wie Ammoniak, Chlor, Methylmethacrylat, Vinylacetat und Acrylnitril mit kontrollierten Dosen von γ-Strahlen bestrahlt. Die physikochemischen sowie mechanischen Eigenschaften der bestrahlten Garne wurden untersucht. Die Ergebnisse zeigen, daß durch Bestrahlung in Gegenwart dieser Chemikalien merkliche Verbesserungen einiger wünschenswerter Fasereigenschaften möglich sind.
    Notes: Polyester and polyamide yarns have been irradiated under controlled doses of γ-rays in presence of chemicals like gaseous ammonia and chlorine as also methyl methacrylate, vinyl acetate, and acrylonitrile monomers. The irradiated monomers have been tested for some of the more important physico-chemical and mechanical properties. The results indicate that the improvements obtained in various desirable properties are of much higher order when irradiation is carried out in presence of the chemicals employed.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1969.050070108
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  • 4
    Electronic Resource
    Electronic Resource
    Spectroscopic characterization of stainless-steel surfaces treated by plasma (1994)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 21 (1994), S. 711-717 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Stainless-steel substrates were surface treated then coated with thin amorphous hydrogenated carbon films that were deposited by CH4 plasma polymerization. The effects of these surface treatments were studied by x-ray photoelectron spectrometry, ion scattering spectrometry and Fourier transform infrared spectrometry. A few minutes of O2 plasma treatment at a power density of 0.5 W cm-2 was shown to modify strongly the surface composition of these substrates, with chromium present at the surface being transformed gradually, from Cr2O3 to CrO3, before disappearing altogether. In contrast, NH3 plasma of similar power, but generated over a few seconds, cleaned and functionalized the surface. Both of these treatments proved to be highly efficient in promoting good carbon film adhesion to the substrate.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740211006
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  • 5
    Electronic Resource
    Electronic Resource
    A new free-radical initiator for the syntheses of polymers with isocyanato end groups (1983)
    Basel : Wiley-Blackwell
    Die Makromolekulare Chemie, Rapid Communications 4 (1983), S. 307-311 
    Details
    ISSN: 0173-2803
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/marc.1983.030040508
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  • 6
    Electronic Resource
    Electronic Resource
    Studies with model membranes. XXII. Evaluation of thermodynamic parameters and testing of theories of membrane and bi-ionic potential based on nonequilibrium thermodynamics (1979)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 17 (1979), S. 539-550 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Thermodynamically effective fixed-charge density of mercuric phosphate and carbonate parchment-supported membranes have been evaluated by the most recent method of Nagasawa et al., based on the thermodynamics of irreversible processes and compared with the values obtained by the Kobatake et al. and Teorell - Meyer - Sievers (TMS) methods. Bi-ionic potential (BIP) has also been measured for these membranes with three pairs of electrolyte solutions: KCl—NaCl, KCl—LiCl, and NaCl—LiCl. Theoretical values of BIP have been calculated by using the membrane potential and BIP theories recently developed by Toyoshima et al., based on nonequilibrium thermodynamics. Various parameters have also been evaluated and it was found that the theoretical equation of BIP is applicable to these parchment-supported membranes.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1979.170170223
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  • 7
    Electronic Resource
    Electronic Resource
    Thermal stability and degradation studies of polyester resins (1989)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 37 (1989), S. 1901-1908 
    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: Thermal behavior and degradation mechanisms of three polyester resins, namely bisphenol A based, isophthalic acid based, and general purpose were studied. These resins were cured with styrene in the presence of benzoyl peroxide (BPO) and methyl ethyl ketone peroxide (MEKP) as initiators. The cured resins were studied by thermogravimetric analysis and mass spectrometry. From the thermogravimetric data it was observed that the cured bisphenol-A-based polyester resin was thermally more stable than the cured isophthalic acid-based and general purpose polyester resins. It was also observed that polyester resins cured with MEKP are thermally more stable than benzoyl peroxide-cured products. Thermogravimetric analysis data shows that there are two first-order degradation reactions during thermal degradation in nitrogen atmosphere. The first degradation step involves the scission of cross-links/weak links with the liberation of free linear chains. The second step involves a random scission of the free linear chains into smaller fragments. The framentation patterns of the polyester resins were identified by mass spectrometery. Possible mechanisms for the degradation of the cured polyesters accounting for the experimental observations are discussed.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1989.070370713
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  • 8
    Electronic Resource
    Electronic Resource
    Drag reduction effectiveness, shear stability and biodegradation resistance of guargum-based graft copolymers (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 33 (1987), S. 1963-1975 
    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: Guargum is a seed galactomannan and is known to be a shear stable drag reducing agent. However, the aqueous solutions of guargum are very susceptible to microbial degradation. In the present investigation, seven graft copolymers of guargum and polyacrylamide have been synthesized and their drag reduction effectiveness, shear stability, and biodegradation resistance have been determined. It has been shown that the drag reduction effectiveness and shear stability of the graft copolymer depend upon the length of the graft and number of grafts in the molecule. None of the graft copolymer solutions show any microbial degradation up to 10 days.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1987.070330610
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  • 9
    Electronic Resource
    Electronic Resource
    Studies on the polymerization of 3.3-bis-(chloromethyl)-oxacyclobutane with anhydrous aluminium chloride (1967)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 108 (1967), S. 67-72 
    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: Die kationische Polymerisation von 3.3-Bis-chlormethyl-oxacyclobutan mit wasserfreiem Aluminiumchlorid wurde bei verschiedenen Temperaturen, Initiatorkonzentrationen und Polymerisationszeiten untersucht mit dem Ziel, höhermolekulare Polymere zu erhalten. Die Beziehung zwischen der Viskosität in Cyclohexanon und dem Molekulargewicht des Polymeren wurde bestimmt. Auf Grund der Resultate wird ein Mechanismus vorgeschlagen, welcher dem der Polymerisation mit BF3 ähnlich ist.
    Notes: The cationic polymerization of 3.3-bis-(chloromethyl)-oxacyclobutane with anhydrous aluminium chloride was studied varying the temperature, initiator concentration, and reaction time in order to get a polymer of high molecular weight. The viscosity-molecular weight relationship of this polymer was determined in cyclohexanone. A mechanism similar to that proposed for BF3 as initiator has been put forwarded in the light of experimental results obtained.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1967.021080104
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  • 10
    Electronic Resource
    Electronic Resource
    Hydrodynamic behaviour of 1,4-trans-polyisoprene (1985)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 186 (1985), S. 2341-2353 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The unperturbed dimensions of 1,4-trans-polyisoprene (TPIP) were estimated using various [η] - Mw extrapolation methods. The results of various methods agree very closely, however, the solvent-polymer interaction parameter, B, assumes different values from method to method. The polymer chains are found to assume random coil structure in solvents like benzene, toluene and cyclohexane. A more compact coiled structure is found in hexane. This was further substantiated by estimation of the excluded volume per segment: 7,3 Å3 in good solvents and 4,0 Å3 in hexane. On a relative scale, the stiffness parameters for TPIP chains were found to be: σ = 1,26 and C∞ = 5,99 for the expanded coil configuration, and σ = 1,11 and C∞ = 4,46 for the compact coil configuration, which is smaller than the literature data. If the latter are corrected for molecular heterogeneity, the agreement with the present data is excellent. The temperature coefficient of the unperturbed dimensions also supports this results.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1985.021861115
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