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  • Articles  (70,161)
  • Springer  (36,345)
  • Springer Nature  (18,530)
  • American Geophysical Union  (5,524)
  • American Chemical Society (ACS)  (5,208)
  • Molecular Diversity Preservation International  (4,554)
  • National Academy of Sciences
  • 2015-2019  (53,435)
  • 2005-2009
  • 1990-1994
  • 1980-1984  (16,726)
  • 2017  (53,435)
  • 1983  (16,726)
  • Physics  (60,347)
  • Process Engineering, Biotechnology, Nutrition Technology  (9,814)
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  • Articles  (70,161)
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  • 2015-2019  (53,435)
  • 2005-2009
  • 1990-1994
  • 1980-1984  (16,726)
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  • 11
    Electronic Resource
    Electronic Resource
    Preparation of ultra-high strength polyethylene fibres by gel-spinning/hot-drawing at high spinning rates (1983)
    Springer
    Polymer bulletin 9 (1983), S. 75-80 
    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 addition of 1 wt.% Al-stearate to the spinning-solution of ultra-high molecular weight polyethylene in paraffin-oil allows takeup speeds of the extrudate of 270 m/min. These as-spun filaments could still be hot-drawn, resulting in a tensile strength of 2.8 GPa. The overall draw ratio's encountered after spinning and hot-drawing are of the order of 1500 suggesting a resemblance between these flow phenomena and superplasticity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275571
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  • 12
    Electronic Resource
    Electronic Resource
    Microscopic observations relating fracture morphology to molecular weight segregation in melt-crystallized polyethylene (1983)
    Springer
    Polymer bulletin 9 (1983), S. 90-97 
    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 Fractography by scanning electron microscopy (SEM) of samples of a low molecular weight, high-density polyethylene from the melt isothermally crystallized at 125°C, together with SEM on these samples treated with p-xylene (including fracture surfaces), polarized light microscopy, differential scanning calorimetry and gel permeation chromatography have provided evidence that fracture preferentially develops along a weakest link path defined by regions of segregated low molecular weight material. The segregated material is to a considerable extent accumulated in the spherulite boundaries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275574
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  • 13
    Electronic Resource
    Electronic Resource
    Graft copolymerization of methyl methacrylate onto reduced wool with potassium perodydiphosphate as initiator (1983)
    Springer
    Polymer bulletin 9 (1983), S. 106-113 
    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 In order to ascertain the role of mercaptan groups during grafting, the graft copolymerization of methyl methacrylate (MMA) onto reduced Indian Chokla Wool fibers in an aqueous medium was investigated using potassium peroxydiphosphate (PP) as initiator. The percentage of grafting was determined as a function of concentration of initiator PP, monomer MMA and sulfuric acid, time, temperature and the presence of solvents. The molecular weight of the grafted polymer decreased as the extent of grafting increased. A kinetic scheme was developed based upon the dependence of the rate of grafting upon the reactant concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275576
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  • 14
    Electronic Resource
    Electronic Resource
    The nature of β-relaxation in polymers (1983)
    Springer
    Polymer bulletin 9 (1983), S. 98-105 
    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 An activation analysis of relaxational β-transition in polymers, oligomers and simple molecular glasses has been made with the aid of DSC and the internal friction (IF) on the specimens under static load. On the basis of the results obtained, literature data and the correlations found, a conclusion has been drawn that β-transition in the linear polymers is defined by the rotation of the chain portion commensurable with Kuhn's segment as well as the intermolecular potential barriers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275575
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  • 15
    Electronic Resource
    Electronic Resource
    Chemical modification of poly(vinyl chloroformate) and of its copolymers using phase transfer catalysis (1983)
    Springer
    Polymer bulletin 9 (1983), S. 114-120 
    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 The chemical modification of poly(vinyl chloroformate) and of its copolymers with compounds containing labile hydrogen atoms like amines, phenols, alcohols and 2-oxazolidone as well as with potassium cyanide and potassium fluoride has been investigated. Phase transfer catalysis conditions lead to soluble modified polymers with good substitution yields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275577
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  • 16
    Electronic Resource
    Electronic Resource
    Antioxidants and stabilizers (1983)
    Springer
    Polymer bulletin 9 (1983), S. 121-124 
    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 efficiency of polyolefine melt stabilizer 2, 2′-thiobis-(4,6-di-tert.butylphenol) (I) as a hydroperoxide decomposing antioxidant was studied under model conditions.tert.Butylhydroperoxide was used to simulate the reaction with polypropylene hydroperoxide. The reaction was performed at 85°C in chlorobenzene solution. Decomposition of tert.butylhydroperoxide by I and formation of the sulphoxide II and the sulphone III from sulphide I were followed quantitatively. Formation of small amounts of effective peroxidolytic species from II or III, responsible for acceleration of hydroperoxide decomposition was considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275578
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  • 17
    Electronic Resource
    Electronic Resource
    β Keto-phosphonate resins (1983)
    Springer
    Polymer bulletin 9 (1983), S. 125-131 
    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 two types of polymers with “hanging” β ketophosphonates groups. The first type was obtained by reacting carbanions of keto-phosphonates with chloromethylated polystyrene; the second one by reacting the same polymer with the tetramethylammonium salt of various β keto-phosphonates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275579
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  • 18
    Electronic Resource
    Electronic Resource
    New telechelic polymers and sequential copolymers by polyfunctional initiator-transfer agents (inifers) (1983)
    Springer
    Polymer bulletin 9 (1983), S. 570-576 
    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 synthesis and characterization of linear telechelic polyisobutylenes having propargyl ether, propargyl ester and propiolic ester end groups are described. The syntheses were accomplished by reacting α, ω-di (hydroxy)-polyisobutylene with propargyl bromide or phthalic anhydride followed by propargylic alcohol or monopropargylic ester of phthalic acid chloride, or propiolic acid in the presence of different catalysts at room temperature (see Scheme 2). According to IR and 1H-NMR analyses quantitative conversions were obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307880
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  • 19
    Electronic Resource
    Electronic Resource
    Intramolecular charge transfer complexes (1983)
    Springer
    Polymer bulletin 9 (1983), S. 577-581 
    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 copolymerization mechanism and the complexation properties of the copolymers of 9-anthrylmethylmethacrylate with acryloyl- β-hydroxyethyl-3.5-dinitrobenzoate and acryloyl-6-hydroxyhexyl-3.5-dinitrobenzoate are presented. The degree of complexation was found to increase by decreasing the difference between the side chain lengths and by increasing the flexibility of the main chain. The strength of complexation was estimated by considering the dependence of the chemical shifts of the aromatic protons on copolymer composition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307881
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  • 20
    Electronic Resource
    Electronic Resource
    13C-NMR studies of thermally isomerized polyphenylacetylenes prepared with MoCl5 and WCl6 catalysts (1983)
    Springer
    Polymer bulletin 9 (1983), S. 582-587 
    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 13C-NMR studies of thermally treated polyphenylacetylenes (PPA) prepared with MoCl5 and WCl6 catalysts provide evidence for intramolecular cyclization and chain scission of both cis and trans polymers. The microstructures of thermally treated cis and trans PPA are different from the microstructure of trans PPA obtained by thermal isomerization during propagation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307882
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