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  • Articles  (15,326)
  • Springer  (13,452)
  • International Union of Crystallography  (1,369)
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  • American Physical Society (APS)
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  • 1975-1979  (15,326)
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  • 1979  (15,326)
  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (6,848)
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  • Articles  (15,326)
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  • 2020-2024
  • 2000-2004
  • 1995-1999
  • 1980-1984
  • 1975-1979  (15,326)
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  • 1
    Electronic Resource
    Electronic Resource
    Polymerization of propylene over titanium exchanged Y-zeolite (1979)
    Springer
    Polymer bulletin 1 (1979), S. 665-670 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary It was found that isotactic polymerization of propylene took place over titanium ion-exchanged Y-zeolite without organometallic compounds. The results obtained have led to the conclusions that Ti4+ species as well as Ti3+ species are active for the polymerization and that neither Ti-alkyl bonds nor Cl ligands are necessarily essential for polymerization of propylene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255440
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  • 2
    Electronic Resource
    Electronic Resource
    Copolymers from 1-phenyl-2-(3-vinylphenylthio)-diazen and styrene and grafting with acrylonitrile (1979)
    Springer
    Polymer bulletin 1 (1979), S. 679-684 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary A new azo monomer (2) was synthesized and copolymerized with styrene. The resulting azo copolymer could be used as an initiator for the acrylonitrile polymerisation yielding grafted copolymers. Quantitative treatment of the grafting experiments leads to the conclusion that the intermediate thiyl radicals show less reactivity towards monomers than phenyl radicals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255442
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  • 3
    Electronic Resource
    Electronic Resource
    Polymeric coordination complexes of some bipositive metal ions with 5,5′-(benzidinebisazo)-8-hydroxyquinoline (1979)
    Springer
    Polymer bulletin 1 (1979), S. 685-690 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Coordination chain polymers of Mn(II), Fe(II), Co(II), Ni(II), Cu(II), zn(II), and Cd(II) with 5,5-(benzidinebisazo)-8-hydroxyquinoline were synthesized by refluxing a mixture of metal acetate hydrates and ligand (1∶1) in DMSO. From analytical data an empirical formula of ML.2H2O is indicated. Ir spectra reveal coordination through O and N of oxine units, thus forming the polymeric chain; presence of coordinated water is also indicated. Magnetic moments and electronic spectra suggest octahedral geometry around the central metal ion. Besides the presence of 2H2O, TGA shows the order of thermal stability as : Cd∼Zn〉 Mn〉 Co∼Ni∼Cu〉Fe.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255443
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  • 4
    Electronic Resource
    Electronic Resource
    Poly(amidine)s and poly(guanidine)s — synthesis and some properties (1979)
    Springer
    Polymer bulletin 1 (1979), S. 715-722 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Synopsis Several poly(amidine) and poly(guanidine) copolymers and their hydrochloride salts were synthesized by introducing the functional groups into suitable polymers. The properties of the resulting copolymers were investigated by base and acid titration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255447
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  • 5
    Electronic Resource
    Electronic Resource
    Load transfer through chain molecules after interpenetration at interfaces (1979)
    Springer
    Polymer bulletin 1 (1979), S. 697-707 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A series of PMMA samples of different molecular weights and degrees of copolymerisation have been tested for their crack-healing behavior. Slightly above Tg, a diffusional interpenetration of chain segments takes place. The fracture toughness in the plane of the interpenetrated interface was measured in short- and longtime experiments. After very short penetration times of only 5 min, full material resistance was regained in short-time experiments, whereas the long-time properties were not restored. A qualitative explanation of these effects, based on structural parameters, is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255445
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  • 6
    Electronic Resource
    Electronic Resource
    Radiation grafting of acrylic acid onto polypropylene fibres (1979)
    Springer
    Polymer bulletin 1 (1979), S. 727-731 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255449
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  • 7
    Electronic Resource
    Electronic Resource
    Synthesis of some new divalent metal salts of mono(hydroxyethyl)phthalate (1979)
    Springer
    Polymer bulletin 1 (1979), S. 723-725 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Divalent metal salts of mono(hydroxyethyl)phthalate (HEP) were considered to be of interest as difunctional ionic monomers and are useful for the preparation of condensation polymers. Recently, Matsuda1 reported the preparation of Ca, Mg and Zn salts of mono-(hydroxyethyl)phthalate and their polymers2–7. He prepared these salts by the reaction of HEP with the respective divalent metal oxides. But so far there was no report on the preparation of Pb2+ and Mn2+ salts of HEP. Since metal dicarboxylates can be obtained by the reaction of organic dibasic acids and metal acetates8, Pb2+ and Mn2+ acetates can similarly react with HEP to give their respective salts at the optimum temperature. We report here the synthesis and characterisation of Pb2+ and Mn2+ salts of mono(hydroxyethyl)-phthalate (HEP).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255448
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of cooling rate on the viscoelastic properties in the plastic zone of solid polymers (1979)
    Springer
    Polymer bulletin 1 (1979), S. 743-748 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract PMMA and PC samples were subjected to several cooling rates from the glass transition temperature. Stress-relaxation data, obtained with these samples under strains larger than the yield strain, were not influenced by the cooling rate previously experienced by the material. This shows that after yielding the effect of previous aging is quickly erased; similar indications, drawn from calorimetric measurements, were already available in (11–12).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00256274
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  • 9
    Electronic Resource
    Electronic Resource
    The use of graft copolymers as enzyme supports (1979)
    Springer
    Polymer bulletin 1 (1979), S. 749-753 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary A new type of polymer support for immobilizing enzymes, a copolymer grafted onto nylon was investigated. Polyacrylamide was used and successfully coupled to β-galactosidase (from yeast and bacteria) using two different methods to give activities of the order of 5 units/g of polymer for the yeast enzyme, and 156 units/g for the E.coli enzyme. Lactose did not affect the yield. The azide method gave better results than the glutaraldehyde method. β-galactosidase coupled enzyme was fairly stable but not as good as the free enzyme. Papain was also coupled to the polyacrylamide grafted nylon using both methods; the glutaraldehyde gave better results with 1.5mg of enzyme being coupled for each gram of polymer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00256275
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  • 10
    Electronic Resource
    Electronic Resource
    Polymerization via zwitterion. 23. Terpolymerization among 2-phenyl-1,3,2-dioxaphospholane, methyl acrylate, and carbon disulfide (1979)
    Springer
    Polymer bulletin 1 (1979), S. 243-251 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The present paper describes the terpolymerization involving 2-phenyl-1,3,2-dioxaphospholane, methyl acrylate, and carbon disulfide, which took place without any added initiator in benzonitrile or dimethylformamide. The structure and composition of terpolymer were determined by NMR and IR spectra, as well as by elemental analysis. A reaction scheme proceeding via zwitterion was proposed (Eq. 2–5).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00254332
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