ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Wiley-Blackwell  (462)
  • 1960-1964  (462)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Polymeric organotin compounds (1961)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 52 (1961), S. 223-229 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Organotin monomers and polymers are becoming of increasing importance. Of especial theoretical and practical interest are polymers of organotin materials. In the present report results are described of studies carried out in the Laboratory of Vinyl Compounds of the Institute of Organic Chemistry of the Academy of Sciences, USSR and in the Plastics Institute of the State Committee on Chemistry of the Council of Ministers, USSR. The syntheses of a number of organotin polymers are reported, in particular, of the organotin polymethyl methacrylates from trialkyl (or aryl) stannyl methacrylates R3Sn—OCO(CH3)=CH2 and dialkyl (or aryl) stannylene dimethacrylates R2Sn[OCOC(CH3)=CH2]2 and copolymers based on these. The high molecular compounds obtained by polymerization of the organotin esters are a new class of vinyl polymers with the structure: Organotin esters copolymerize with various unsaturated monomers such as methyl methacrylate, styrene, acrylonitrile, cyclopentadiene, etc. The copolymers are mechanically strong, transparent materials. They represent considerable barriers to the passage of x-rays. The organotin esters R3SnOCOC(CH3)=CH2 and R2Sn[OCOC(CH3)=CH2]2 containing the alkyl radicals amyl, hexyl and higher groups polymerize at room temperature in the absence of catalysts to form soft and elastic polymeric materials. In the report a number of properties of another class of organotin polymers, namely, dialkyl (or aryl) stannones (R2SnO)n are discussed. It is suggested that they are high molecular compounds. Their x-ray diagrams and the results of other physicochemical analyses are examined. A study of their Debye x-ray diagrams showed that they have a regularly oriented structure. They are highly reactive and are sources for the preparation of new organotin compounds. Some of their physicochemical properties are described.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1961.1205215729
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Biosynthese von Vitamin B12 und Porphyrinen in Propionobacter (1962)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 74 (1962), S. 36-36 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19620740137
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Theoretical evaluation of the flory universal constant (1960)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 46 (1960), S. 528-529 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1960.1204614822
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Effect of heterogeneity on the second virial coefficientPart of Ph.D. thesis submitted by V. S. R. Rao to Osmania University, 1959. (1961)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 50 (1961), S. 31-34 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The values of the second virial coefficient A2, were determined by a light-scattering method for polymethyl methacrylate mixed fractions in methyl ethyl ketone and ethyl acetate systems. It is shown that in a mixture of two components A2 is sensitive to the presence of the higher molecular weight component in a sample of a lower molecular weight, but not to the presence of a lower molecular weight component in a sample of higher molecular weight. This effect is found to be predominant in the good solvent (methyl ethyl ketone). The results obtained are in general agreement with those of Chien et al. but are in contrast with those of Elias.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1961.1205015304
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Preparation of new types of linear polymers by the polyrecombination reaction (1961)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 52 (1961), S. 213-221 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: In an extension of previously reported studies of the use of the polyrecombination reaction to synthesize high molecular weight compounds, it has been shown for the first time that this method yields linear polymers without any significant formation of threedimensional structures. Such polymers may be synthesized from compounds containing a methylene group in the α-position to the benzene ring, carboxyalkyl or carboxyphenyl groups. On treatment of diphenylmethane with tert-butyl peroxide, a linear polymer of molecular weight 10,000-900,000 (depending on the quantity of peroxide used) was obtained. Linear polymers in the form of benzene-soluble powders were also obtained from benzyl benzoate (molecular weight 400,000), methyl phenylacetate, etc. The composition and structure of the polymers obtained were confirmed by chemical analysis and infrared spectroscopy. The relation between the molecular weight of the polymer and the amount of peroxide consumed in the reaction was also established. If groups capable of serving as branching centers in the polymer (e.g., methyl groups in ditolylmethane) are present in the starting compounds, three-dimensional products are formed along with the linear polymers.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1961.1205215728
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Comparison of the specific resistances of cakes formed in filters and centrifuges (1960)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 6 (1960), S. 382-390 
    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: Resistances to the flow of fluids through porous beds were determined in a compression-permeability cell, a vacuum test filter, and an experimental centrifugal filter. The study was made on nearly incompressible beds composed of Lucite spheres having a given size distribution. The results show that liquid flow through the cakes in all three kinds of equipment can be described by a common basic equation, the terms of which are modified to reflect the type of operation. The centrifugal-drainage data confirm the form of the centrifugal-filtration equation. The specific resistances deduced from vacuum-filtration and centrifugal-drainage tests agree with permeability-cell alphas within 16% at the same Δ P and within 2 to 3% at the same porosity.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690060308
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Study of the structure of polymers by infrared spectra (1964)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 8 (1964), S. 2923-2933 
    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: In this review a short outline of the results of the application of IR-spectroscopy to the study of polymer physics is summarized. Questions of rotational isomerism, mechanical deformation of polymers, crystallization, intramolecular order, and microtacticity determination are discussed. Details are given on the authors' data concerning polypropylene, 1,4-trans-polybutadiene, poly(methyl methacrylate), and cellulose triacetate, and also data on calculations of spectra for different conformations of poly(vinyl chloride), poly(vinyl bromide), and poly(ethylene terephthalate).
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1964.070080635
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Polymerization reactions on insoluble molecularly disperse substances (1961)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 52 (1961), S. 71-76 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Atomic and molecular dispersions of inorganic solids in monomer media has been found capable of giving rise to highly active polymerization centers effective at low tempera- tures It was shown, using BeCl ZnClz, LiC1, TiC1, and RloOj, that salts and oxides which in the form of perfect crystals are not polymerization catalysts, in the molecular disperse state or with highly defective structures may cause the polymerization of a number of monomers (styrene, a-methylstyrene, isoprene) at their melting points. A study was made of the initiating capacity of some metals in molecular mixtures with monomers. It was shown that with suchamixtures of Mg and acrylonitrile, methyl methacrylate, or methyl acrylate rapid low-temperature polymerization in the solid state takes place. The polymerization is induced by radicals formed on reaction of Mg with the monomers. Similar conversions may occur in the presence of other metals (Hg, Zn, Cd). The methyl methacrylate produced in this way was found to have an isotactic structure. Hence the part played by preliminary ordering of the monomer on the formation of the polymer microstructure has been demonstrated. Studies with the crystalline salts of acrylic and methacrylic acids show that it is possible to initiate poly- merization in the solid phase by the formation of defective crystal structures in the system. This may be arcomplished by heterogeneous chemical reactions and intensive mechanical dispersion of the solid monomers.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1961.1205215711
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Synthesis and properties of some aromatic polymers (1961)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 55 (1961), S. 675-682 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Multinuclear aromatic compounds are distinguished by considerable thermostability. In a number of cases they have been shown to be endowed with semiconductor properties. In view of this the development of a method of synthesis and investigation of aromatic polymers with a common system of conjugated bonds has both theoretical and practical interest. Such substances have been synthesized by the authors on decomposing bisdiazo compounds by an ammoniacal solution of univalent copper, and also on decomposition of bisnitroso acetates. In particular, 4,4′-bisdiazobiphenyl, 4,4′-bisdiazobitoyl, 4,4′-bisdiazobiphenyl-3,3-dicarboxylic acid, and benzidine N,N′-bis-nitroso acetate were employed. On decomposition of the bisdiazo compounds a powder of orange to brown color was formed, soluble in concentrated sulfuric acid and isoluble in most organic solvents. Analysis showed it probably to possess the composition: where R may be H, COOH, or CH3. On the average one azo group is present for each 4-10 benzene rings and two chlorine atoms for each 10-20 rings. The mean molecular weight determined for one of the carboxylated polymer specimens was found to be 3000. On heating to 400° the polymer decarboxylates. At 450° decomposition sets in. Viscosity curves of the solutions (plots of ηsp/C vs. C) exhibit an anomalous rise within the limits C = 0.1-1%. The concentration of unpaired electrons in the polymers was shown by the electron resonance method to be ∼1019/g. Heating the substances leads to an increase in concentration of unpaired electrons by 1-2 magnitudes. The spectra and x-ray diagrams of the substance were obtained. Evidently the formation of polymers from bisdiazo compounds is of a radical nature, leading to the formation of stable radicals of low activity. Low molecular fractions isolated from the polymers are fusible and soluble in benzene. They are capable of reacting with diethynylbenzene with the formation of nonmelting and insoluble thermostable products. Carboxylated polymers form salts with transition elements that evidently are of the nature of intracomplex compounds with intermolecular crosslinkage. Products of the decomposition of benzidine bisnitroso acetate are in general similar to those resulting from bisdiazodiphenyl, but contain less unpaired electrons.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1961.1205516221
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Über molekulargewichtsverteilungen, die bei schnellen polymerisationsreaktionen ohne kettenabbruch auftreten. Teil II. Polymerisation von styrol mit konzentrierter initiatorlösungVorgetragen anläßlich der 59. Hauptversammlung der Deutschen Bunsengesellschaft in Bonn am 28. Mai 1960. (1960)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 41 (1960), S. 1-8 
    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: To explain the molecular inhomogeneity of “living polymers” nowadays two assumptions have been made: (1) the starting reaction is slow compared with the propagation; (2) the mixing velocity is small in relation to the propagation. According to the second assumption the distribution of molecular weights has been calculated by the “expanding drop method” and was found to be in agreement with experiments. Further experiments with rather high concentrations of initiator show that the velocity of initiation is higher than one must expept if the first assumption would be correct.
    Notes: Zur Erklärung der molekularen Uneinheitlichkeit sogenannter lebender Polymerer sind in letzter Zeit besonders zwei Vorstellungen entwickelt worden: (1) Die Startreaktion ist sehr langsam gegenüber dem Wachstumsprozeß, (2) der Mischungsvorgang ist langsam gegenüber dem Wachstum. Für den Fall (2) wurde die Molekulargewichtsverteilung nach der Methode des “expandierenden Tropfens” berechnet und in Übereinstimmung mit den Versuchen gefunden. Weitere Experimente mit relativ konzentrierten Initiatorlösungen zeigen, daß der Kettenstart keineswegs so langsam ist, wie bei Gültigkeit der Annahme (1) zu erwarten wäre.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1960.020410101
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...