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  • Polymer and Materials Science  (925)
  • Chemical Engineering  (180)
  • SPACE RADIATION  (179)
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  • 1
    Electronic Resource
    Electronic Resource
    The interaction between styrene-butadiene rubber and carbon black on heating (1960)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 3 (1960), S. 213-223 
    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: The interaction between a carbon black filler and styrene-butadiene rubber is increased if the material is heated after milling. This effect has been attributed to the polymeric free radicals which are presented after milling but which require a high temperature to increase their mobility to the point where they can react. The extent of interaction increases with time of heating and with the amount of milling before heating. The postulated mechanism is supported by the experimental activation energies and by the predictable influence of free radical scavengers on the system.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1960.070030811
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Vibrational spectroscopic study of poly(ethylene terephthalate) crystallized by annealing in the oriented state (1981)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 26 (1981), S. 223-230 
    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: Poly(ethylene terephthalate) filament yarn has been annealed in nitrogen atmosphere, in silicone oil, or in nonreacting organic solvents. Morphological changes resulting from the annealing processes have been followed by Raman spectroscopy. Crystallinity, as evidenced by the width of the 1730 cm-1 carbonyl stretching vibration, is shown to affect the macroscopic properties of these filaments. Furthermore, these spectroscopic results, together with shrinkage measured, suggest that the shrinkage and the crystallization processes in the polymer fiber proceed at different rates in different fluid media.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1981.070260121
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Chronocoulometric interrogations of oxidase-based enzyme electrodes for enhanced selectivity (1994)
    Weinheim : Wiley-Blackwell
    Electroanalysis 6 (1994), S. 83-88 
    Details
    ISSN: 1040-0397
    Keywords: Biosensor ; Chronocoulometry ; Glucose ; Interferences ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Classical oxidase-based enzyme electrodes rely on the amperometric determination of H2O2. Such electrodes are vulnerable to electroactive interferants found in biological solutions. Some interferants may be oxidized at anodic potentials, necessitating the use of permselective barrier membranes. Two generic chronocoulometric approaches to the interrogation of oxidase-based enzyme electrodes have been developed. Both the chronocoulometric interrogation of H2O2 and the chronocoulometric interrogation of the reduction of O2 (formed from the anodic oxidation of H2O2) have allowed new correlations to be made with 0 to 20 mM glucose concentrations. Furthermore, the inter rogation of O2 has allowed a glucose sensor to be constructed that is virtually free from the effects of electroactive interferants.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140060203
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Bimolecular termination in the cyclopolymerization of diallyl cyanamide under pressure (1969)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Letters 7 (1969), S. 153-155 
    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.1969.110070212
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  • 5
    Electronic Resource
    Electronic Resource
    Soluble high polymers from allyl methacrylate (1968)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-1: Polymer Chemistry 6 (1968), S. 3007-3013 
    Details
    ISSN: 0449-296X
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Allyl methacrylate has been polymerized by free-radical methods and found to yield a soluble polymer in carbon tetrachloride, dioxane, and diallyl ether solutions. The overall rate equation in diallyl ether is Rp = k[ln]0.7[M]1.6. It is suggested that propagation and cyclization reactions proceed only via addition to the methacrylyl groups of the monomer. Some degradative chain transfer occurs with the allyl groups, and it is considered that the solvents may ensure the production of soluble polymers by reactions in which allyl-radical side chains are terminated without crosslinking.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1968.150061105
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of high pressures on the cyclopolymerization of acrylic anhydride (1970)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-1: Polymer Chemistry 8 (1970), S. 1705-1711 
    Details
    ISSN: 0449-296X
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The effect of pressures up to 4000 atm on the free-radical cyclopolymerization of acrylic anhydride in solution has been investigated. Both the molecular weight and degre of cyclization of the polymer are increased by pressure. The rate of polymerization at first decreases with increasing pressure, but above 2500 atm a normal acceleration occurs.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1970.150080709
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  • 7
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    Implications of new measurements of O-16 + p + C-12,13, N-14,15 for the abundances of C, N isotopes at the cosmic ray source (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The fragmentation of a 225 MeV/n O-16 beam was investigated at the Bevalac. Preliminary cross sections for mass = 13, 14, 15 fragments are used to constrain the nuclear excitation functions employed in galactic propagation calculations. Comparison to cosmic ray isotonic data at low energies shows that in the cosmic ray source C-13/C approximately 2% and N-14/0=3-6%. No source abundance of N-15 is required with the current experimental results.
    Keywords: SPACE RADIATION
    Type: OG-4.3-2 , 19th Intern. Cosmic Ray Conf - Vol. 2; p 80-83; NASA-CP-2376-VOL-2
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
    Electronic Resource
    Electronic Resource
    Modeling and dynamic simulation of a bleach plant (1995)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 41 (1995), S. 2603-2613 
    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: A dynamic model of five-stage (C+D)EDED bleach plant was developed using SIMNON a dynamic simulation language developed at Lund Institute of Technology, as a platform. The model is composed of individual modules that represent each bleaching stage. Each module includes chemical addition and mixing, diffusion and reaction in a retention towel, and washing. These unit operations are coupled with chemical kinetics for each bleaching stage using appropriate models. A relationship between the (C+D)E Kappa number and the input absorption coefficient to the D1 stage was used to link the delignification and brightening partial sequences of the bleach plant. The model, verified using steady-state data, was used to model the dynamic response of the plant to step changes in production rate, (C+D) chemical addition, and incoming Kappa number, as well as the open-loop response of the plant to a simulated variation in incoming Kappa number. The modular structure of the program allows a variety of bleach plants to be assessed once flow parameters and chemical kinetics are known. The dynamic model can also be used to develop and compare control strategies before being implemented at the mill.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690411209
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  • 9
    Electronic Resource
    Electronic Resource
    XPS analysis of polypropylene grafted with acrylic monomers (1994)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 22 (1994), S. 502-506 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: X-ray photoelectron spectroscopy (XPS) has been used to characterize the surface of nonwoven polypropylene grafted with acrylic monomers. Results obtained for the non-ionic hydroxyethyl methacrylate (HEMA) and 2,3-dihydroxypropyl methacrylate (DHPMA) are very clear and in agreement with those of CWST (critical wetting surface tension) measurements. Estimation of the thickness of the grafted layer from the XPS measurements is consistent with results from a simple theoretical calculation. The results obtained for the ionic methacrylic acid (MAA) deviate and are not in agreement with those of the CWST measurements. This is not understood, but might be attributed to the folding of the more polar MAA chains under dry conditions, leading to incomplete coverage of the surface. A second explanation is a higher contribution of grafting in the bulk of the polymer. Both explanations are supported by grafting of MAA from methanol as solvent.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.7402201106
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  • 10
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    Spectral properties of the X-ray objects GX 3 plus 1, GX 354-5 and Sco XR-1. (1968)
    In:  Other Sources
    Details
    Publication Date: 2011-08-12
    Description: Spectral properties of celestial X ray objects near galactic center from balloon observation, noting supernova origin and magnetic bremsstrahlung emission mechanism
    Keywords: SPACE RADIATION
    Type: ; ADEMIE DES SCIENCES
    Format: text
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    NASA TECHNICAL REPORTS
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