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  • Articles  (37,714)
  • Springer  (18,932)
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  • 1985-1989  (26,776)
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  • Articles  (37,714)
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  • 2010-2014
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  • 1985-1989  (26,776)
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  • 1
    Electronic Resource
    Electronic Resource
    Sonic-velocity measurements as a suitable tool for the observation of structural changes in polymeric materials (1985)
    Springer
    Polymer bulletin 13 (1985), S. 15-20 
    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 sonic velocity of preoriented PET fibres as a function of temperature was measured in dependence on the degree of orientation, stress applied to the fibres, and heating rate. The results reflect the structural and orientation changes which take place in the range of and above the glass transition temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00264235
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  • 2
    Electronic Resource
    Electronic Resource
    Unusual stress-strain properties of natural rubber vulcanizates with high primary molecular weight (1985)
    Springer
    Polymer bulletin 13 (1985), S. 29-33 
    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 Natural rubber vulcanizates with high primary molecular weight were prepared by mixing raw rubber and dicumyl peroxide in benzene followed by freeze-drying. The stress-strain properties of these vulcanizates were quite different from those prepared by conventional mastication method. The important characteristics of these vulcanizates is high tensile modulus, high tensile strength, large hysteresis loss, and higher degree of strain-induced crystallization. The difference in the stress-strain behavior between these rubbers and conventional vulcanizates are discussed from the standpoint of the network structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00264237
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  • 3
    Electronic Resource
    Electronic Resource
    Stable carbocationic species observed during the oligomerization of p-isopropyl-α-methyistyrene initiated by CH3SO3H in CH2CI2 solution (1985)
    Springer
    Polymer bulletin 13 (1985), S. 89-89 
    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/BF00264246
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  • 4
    Electronic Resource
    Electronic Resource
    Importance of junction functionality in highly crosslinked polymers (1985)
    Springer
    Polymer bulletin 13 (1985), S. 91-96 
    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 modification of a theoretical model for the determination of the number average molecular weight between crosslinks, ¯Mc, is presented for the case of multifunctional junction functionalities in highly crosslinked, macromolecular systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00254215
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  • 5
    Electronic Resource
    Electronic Resource
    New telechelic polymers and sequential copolymers by polyfunctional initiator transfer agents (inifers) (1985)
    Springer
    Polymer bulletin 13 (1985), S. 97-102 
    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 Three-arm star polyisobutylenes carrying tert.-chlorine end groups and a phenyl ring at the center of the star (see formula II in the Introduction) have been prepared by a continuous polymerization process. Thus into a stirred glass reactor were fed continuously a mixed feed of monomer plus trinifer (TCC) and a separate feed of BCl3 coinitiator in methyl chloride solvent at −40°C, and the product plus unreacted ingredients were removed continuously. Stationary conditions were maintained by keeping the rates of input and output (i.e., volumes) equal and constant. After a short induction phase (∼2–3 residence times) telechelic polymers of essentially theoretical number average end functionalities (¯Fn=3.0+0.1), close to theoretical molecular weights (¯Mn) and molecular weight distributions were obtained. The polymerization kinetics are discussed and compared to that of an earlier semicontinuous process used for the routine synthesis of telechelic polyisobutylenes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00254216
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  • 6
    Electronic Resource
    Electronic Resource
    Monotropic liquid crystalline poly(β-thioester)s containing bis (p-oxybenzoate) mesogenic units (1985)
    Springer
    Polymer bulletin 13 (1985), S. 131-137 
    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 series of thermotropic liquid crystalline poly(β-thioester)s was prepared by a Michael-type polyaddition of α,ω-polymethylenedithiols of different length to a mesogenic diacrylate containing two bis(p-oxybenzoate) units symmetrically connected through a dodecamethylene segment. The thermotropic behaviour was studied by combined DSC and thermal-optical analyses. All the poly(β-thioester)s investigated exhibited quite unusual monotropic mesomorphism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00254221
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  • 7
    Electronic Resource
    Electronic Resource
    Preparation of low-density polyethylene composites by UV irradiation (1985)
    Springer
    Polymer bulletin 13 (1985), S. 163-169 
    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 Composites of low-density polyethylene were prepared by the sorption of vinylic monomers and a photoinitiator into a polymer matrix, followed by UV irradiation. Gravimetric determinations showed that 2–4% incorporation of the polymer in the host matrix is possible by this method. Transmission and reflectance infrared spectra measurements showed that the vinylic polymer is lodged in the bulk of the polymer film with no surfacial deposition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00254226
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  • 8
    Electronic Resource
    Electronic Resource
    Announcement (1985)
    Springer
    Polymer bulletin 13 (1985), S. 193-193 
    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/BF00254230
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  • 9
    Electronic Resource
    Electronic Resource
    Chromatographic determination of polymer solubility parameters (1985)
    Springer
    Polymer bulletin 13 (1985), S. 463-467 
    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 Weight fraction activity coefficients (Ω1)∞ and interaction parameters x have been determined for seven different solvents in Polyarylate at three temperatures by the gas chromatographic method (inverse gas chromatography). Data have been used to calculate infinite dilution solubility parameters according to the method proposed by DiPaola-Baranyi and Guillet. The validity of the plots involved in the above mentioned method is also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01033346
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  • 10
    Electronic Resource
    Electronic Resource
    Compositional sequence distribution and second-order Markov statistics in vinyl chloride-vinylidene chloride copolymers by Carbon-13 NMR (1985)
    Springer
    Polymer bulletin 13 (1985), S. 473-479 
    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 90 MHz-1H-NMR and 22.635 MHz-13C-NMR spectroscopy were used in a study of vinyl chloride-vinylidene chloride co-polymers. Triad sequence distribution of CCl2 and CHCl carbon was generated for these copolymers and compared to calculated distributions based on Bernoullian, first-order Markov and second-order Markov statistics. It was observed that for samples different in the conditions of preparation including commercial materials in each case different Markov models give the best fit in formally mathematical treatment without kinetic significance but with the aim of interpretation of physical and/or chemical properties of the copolymers. The 52–56 ppm region of the VC-VDC copolymer spectra is complicated by the superposition of the effects of tacticity, sequence distribution and the presence of both CH and CH2 carbons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01033348
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