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  • 1
    Electronic Resource
    Electronic Resource
    In memoriam Maurice L. Huggins (1982)
    Springer
    Colloid & polymer science 260 (1982), S. 557-558 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01422585
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  • 2
    Electronic Resource
    Electronic Resource
    Die Volumenretardation des Polystyrols nach Druck- und Temperatursprüngen (1967)
    Springer
    Rheologica acta 6 (1967), S. 30-53 
    Details
    ISSN: 1435-1528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Summary Measurements of the isothermal-isobaric volume retardation in crosslinked and non-crosslinked polystyrene are reported. The measurements have been carried out applying the temperature-jump method, and, for the first time, also the pressure-jump method. For the measurements using the temperature-jump method a quartz-glassdilatometer has been used which allows the registration of volume changes of ±7·106 cm3. A pressure dilatometer has been developed for the measurements according to the pressure-jump method which permits volumemeasurments of the same precision in the pressure-range between 1 and 60 atmospheres. The experimental results show that for the volume retardation of polystyrene a measurable linear region exists. For this case of linear retardation behaviour various kinetic theories predict an exponential time dependence of the deviation of the volume from the equilibrium value, which is due to the existence of a single retardation time. This result is not confirmed by our experiments. The volume retardation in the linear region — at least for polystyrene — can in no case be described in terms of a single retardation time, but only by a distribution of retardation times. It turns out, that the retardation function (distribution function of retardation times) in the linear region differs after a previous temperature change from that after a previous pressure change. This result can be confirmed by theoretical considerations which follow fromMeixner's thermodynamic theory of linear relaxation phenomena.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01968380
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  • 3
    Electronic Resource
    Electronic Resource
    Zur Thermodynamik der Quellung (1964)
    Springer
    Colloid & polymer science 194 (1964), S. 16-34 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01499973
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  • 4
    Electronic Resource
    Electronic Resource
    Zur Thermodynamik der Quellung (1964)
    Springer
    Colloid & polymer science 196 (1964), S. 97-125 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01499571
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  • 5
    Electronic Resource
    Electronic Resource
    Zur Thermodynamik der Quellung (1964)
    Springer
    Colloid & polymer science 199 (1964), S. 1-9 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Zusammenfassung Aus allgemeinen thermodynamischen Betrachtungen über den Verlauf der differentiellen freien Verdünnungsenthalpie in glasigen Mischphasen wurde geschlossen, daß die Quellungskurve, die den Temperaturverlauf des Quellungsgleichgewichts beschreibt, am Einfrierpunkt des gesättigten Gels infolge Freiwerdens der partiellen molaren Einfrierwärme des Lösungsmittels einen Knick aufweisen muß. Dabei erfolgt das Abknicken so, daß die Sättigungskonzentration des Lösungsmittels im Glaszustand größer ist, als sie im Zustand des inneren Gleichgewichts bei der gleichen Temperatur wäre. Diese thermodynamischen Überlegungen konnten durch Messungen des Quellungsgleichgewichts von vernetztem Polystyrol in geeigneten Lösungsmitteln experimentell bestätigt werden. Damit ist für den Spezialfall des Quellungsgleichgewichts gezeigt, daß eine glasige, also eingefrorene Phase, mit einer anderen Phase, die sich im inneren Gleichgewicht befindet, koexistieren kann. Das heterogene Gleichgewicht zwischen zwei Phasen kann sich demnach auch dann einstellen, wenn sich eine der beiden Phasen nicht im inneren Gleichgewicht befindet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01499685
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  • 6
    Electronic Resource
    Electronic Resource
    Crystallization and stereo assocation of stereoregular PMMA, 2Part 1: cf. 13.. Crystallization behavious of the stereocomplex in comparison with that of pure stereoregular PMMADedicated to Prof. Dr. H.-J. Cantow on the occasion of his 60th birthday (1983)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 184 (1983), S. 2679-2691 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The crystallization behaviour of stereoregular PMMA was studied by means of DSC and X-ray measurements. Both nucleation and crystallization rates of i-PMMA. are slower by orders of magnitude compared with s-PMMA and with the 1:1-i/s-stereocomplex of PMMA. The investigation of the nucleation and crystallization of i-PMMA by means of the DSC method leads to the results that both nucleation and crystallization rates show a maximum in the region between melting and glass transition temperature. As a result of the fast crystallization rates of s-PMMA and the stereocomplex, however, these polymers do crystallize without annealing showing a very broad distribution of crystallite sizes. From the shape of the melting curves as a function of annealing time it can be concluded that the crystallization of i-PMMA gels leads to the formation of a physical network, which contains small and big crystallites. The results of the measurements allow the determination of the heat of stereocomplex formation. The value found of 24 J · g-1 agrees with values obtained directly on mixing dilute solutions of i- and s-PMMA. As a result of calorimetric measurements the liquidus curves of the quasi-binary systems of solvent (o-xylene) and stereoregular PMMA are obtained. Taking into account data of former work for the quasi-binary system of i-PMMA and s-PMMA, the shape of the liquidus surface in the quasi-ternary system of i-PMMA, s-PMMA, and solvent (o-xylene) can be constructed.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1983.021841225
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  • 7
    Electronic Resource
    Electronic Resource
    Elastic and photoelastic properties of polyisoprene networks  -  applicability and bounds of theories (1986)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 187 (1986), S. 1273-1286 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Measurements of stress and birefringence of networks of natural rubber and cis-1,4-polyisoprene deformed by simple elongation are reported. The experimental results are compared with theoretical calculations. It is found that the stress-strain relation is in accordance with the empirical Mooney-Rivlin equation. The constants 2 C1 and 2 C2 increase linearly with temperature indicating that both reflect essentially entropic elasticity. From theories dealing with the origin of the Mooney-Rivlin behaviour, neither the entanglement concept nor the fluctuation or packing concept alone may account for the elastic behaviour observed. The photoelastic investigations prove the well-known proportionality of stress and birefringence.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1986.021870523
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  • 8
    Electronic Resource
    Electronic Resource
    The rubber elastic behaviour of crosslinked polymers and a critical consideration of theoretical conceptsDedicated to Prof. O. Wichterle on the occasion of his 70th birthday (1984)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 185 (1984), S. 1751-1759 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The elastic properties in simple elongation have been investigated under various aspects for a series of elastomers, which were crosslinked randomly in the bulk state. The results are compared with different theoretical concepts for explaining the deviations from predictions of the simple statistical theory of rubber elasticity. The results do not favour clearly any one of the theoretical concepts under discussion.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1984.021850821
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  • 9
    Electronic Resource
    Electronic Resource
    Phase behaviour and structure of polymer surfactants in aqueous solution. The occurrence of lyotropic nematic phasesPresented by H. Finkelmann on the “83. Hauptversammlung der Deutschen Bunsen-Gesellschaft für Physikalische Chemie” in Kaiserslautern, Federal Republic of Germany, on May 30, 1984. Present address: Institut für Makromolekulare Chemie, Universität, Stefan-Meier-Str. 31, 7800 Freiburg, FRG. (1985)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 186 (1985), S. 1059-1073 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The binary phase diagrams are analyzed in aqueous solutions of monomeric, non-ionic surfactants and the corresponding polysiloxanes having attached the surfactants as side chains via the hydrophobic parts of the amphiphiles. In contrast to common surfactants these hydrophobic parts additionally contain a rigid, mesogenic biphenyl moiety. While the polymeric surfactants exhibit hexagonal and lamellar lyotropic liquid crystalline phases, similarly to the low-molar-mass surfactants, two important results have to be emphasized: (i) The liquid crystalline phase regions are markedly extended with respect to concentration and temperature compared with the corresponding monomers, as shown in a similar way for thermotropic polymer liquid crystals. (ii) The phase sequence of the polymorphic liquid crystalline phases can be changed by polymerization. While for the systems under investigation the monomeric surfactant exhibits a cubic phase, the polymeric surfactant shows no cubic but a nematic phase in front of the hexagonal phase at low surfactant concentration. The nematic phase of the polymeric surfactant is the first example for a nematic phase, which is formed for binary mixtures of non-ionic surfactants and water.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1985.021860515
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  • 10
    Electronic Resource
    Electronic Resource
    Das Assoziationsverhalten ataktischer und stereospezifischer Polymethylmethacrylate (1971)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 83 (1971), S. 375-375 
    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.19710831040
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