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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
    Morphologie von Polyäthylenterephthalat unterschiedlichen Molekulargewichts (1982)
    Springer
    Colloid & polymer science 260 (1982), S. 502-507 
    Details
    ISSN: 1435-1536
    Keywords: Polyethyleneterephthalate ; molecular weight ; crystallization ; melting behaviour ; morphology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Abstracts Polyethyleneterephthalate-(PET-) films were degraded by aminolysis for several different times. The samples produced in this manner differ significantly in (average) molecular weight, crystallization und melting behaviour, and morphology. The density of primary nuclei decreases with the reduction of molecular weight as it has been shown by Ueberreiter in a previous work on polyethylenesuccinate.
    Notes: Zusammenfassung Polyäthylenterephthalat-(PET-)Folien wurden aminolytisch unterschiedlich lange abgebaut. Die so hergestellten Produkte unterscheiden sich deutlich im (mittleren) Molekulargewicht, dem Kristallisations- und Schmelzverhalten und der Morphologie. Die von Ueberreiter an Polyäthylensuccinat nachgewiesene Beobachtung, daß die Primärkeimdichte mit geringer werdendem Molekulargewicht abnimmt, konnte bestätigt werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01452996
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  • 3
    Electronic Resource
    Electronic Resource
    Orientation of fluorescent probes and polymer segments in uniaxially drawn polycarbonate and Polyvinylchloride films as revealed by dichroism, fluorescence polarization and birefringence (1983)
    Springer
    Colloid & polymer science 261 (1983), S. 800-804 
    Details
    ISSN: 1435-1536
    Keywords: Noncrystalline polymers ; Hermans' orientation factor ; dichroism ; fluorescence polarization ; birefringence
    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: Abstract PVC- and PC-films doped with various fluorescent molecules were uniaxially drawn below and just above the glass transition temperature. The orientation of fluorescent probes and polymer segments is discussed, comparing Hermans' orientation factors evaluated from birefringence for the segments and from dichroism and fluorescence polarization for the probes. Moreover, the orientation of the fluorescent probes is related to that of hypothetical units, orientated according to the pseudoaffine deformation mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01421432
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  • 4
    Electronic Resource
    Electronic Resource
    Change of structure and orientation of semicrystalline drawn poly(ethyleneterephthalate) films on simultaneous thermal and mechanical treatment (1985)
    Springer
    Colloid & polymer science 263 (1985), S. 973-984 
    Details
    ISSN: 1435-1536
    Keywords: Small angle X-ray scattering ; mean square density fluctuation ; microvoids ; orientation ; poly(ethyleneterephthalate)
    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: Abstract Highly oriented semicrystalline PET films are exposed to uniaxial statical load both parallel and perpendicular to the preferential orientation direction at various temperatures. The loading of the specimens parallel to the preferential orientation direction leads to an increase in orientation of the chain segments within the amorphous interlayers and to a decrease of density of the amorphous regions which in combination with a rise of the microvoid volume ratio effects a significant increase of the mean square density fluctuation. Thereby chain segements may emerge from the crystalline regions and may pass into the amorphous interlayers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01410990
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  • 5
    Electronic Resource
    Electronic Resource
    Orientation analysis of uniaxially drawn polystyrene films doped with fluorescent molecules by fluorescence polarization, UV-and IR-dichroism and birefringence (1985)
    Springer
    Colloid & polymer science 263 (1985), S. 392-395 
    Details
    ISSN: 1435-1536
    Keywords: Dichroism ; fluorescence polarization ; birefringence ; fluorescent probes ; polystyrene
    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: Abstract Atactic polystyrene (PS) is doped in solution with various fluorescent molecules and cast to films. Rectangular samples, cut from these films, are uniaxially drawn at 100 °C and 110 °C. The orientation of the fluorescent probes is characterized by UV-dichroism and fluorescence polarization, that of the polymer segments by IR-dichroism and birefringence. It is observed that the fluorescent molecules depending on their structure tend to orientate more or less perpendicular to the drawing direction. This can be understood by assuming that the benzene rings of the fluorescent probes try to associate to those of the polymer. As consistent values of the angle between the 2850 cm−1 transition moment and the chain axis and of the intrinsic birefringence result 70° and −0.10 respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01410386
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  • 6
    Electronic Resource
    Electronic Resource
    Characterization of several modified jute fibers using zeta-potential measurements (2000)
    Springer
    Colloid & polymer science 278 (2000), S. 229-235 
    Details
    ISSN: 1435-1536
    Keywords: Key words Jute fiber ; Surface modification ; Zeta-potential
    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: Abstract  ζ-potential measurements using the streaming potential method were performed on several differently modified jute fibers. The time dependence of the ζ-potential measured in 1 × 10−3 M KCl solution offers the possibility to characterize the water-uptake behavior and the velocity constant of this process for almost all the jute fibers investigated. All the jute fibers contain, as expected, dissociable acidic surface functional groups as could be verified by measuring the pH dependence of the ζ-potential. Remarkably a peak (increase in the negative ζ-potential values) was detected while measuring the ζ–pH dependency. The origin of this peak is still questionable; however, it could be observed that this peak is a function of the degree of surface coverage of additional components, such as fats, waxes or grafted polymers, i.e. the accessibility of ether functions in the jute fiber surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050036
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  • 7
    Electronic Resource
    Electronic Resource
    Untersuchungen zum Schmelzverhalten des verstreckten Polyäthylens mit Hilfe der Differential-Thermo-Analyse (1966)
    Springer
    Colloid & polymer science 213 (1966), S. 28-38 
    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/BF01552511
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  • 8
    Electronic Resource
    Electronic Resource
    Schmelz- und Rekristallisationsvorgänge bei Polyäthylen-Einkristallen (1966)
    Springer
    Colloid & polymer science 213 (1966), S. 93-109 
    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/BF01552518
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  • 9
    Electronic Resource
    Electronic Resource
    Thermal-mechanical analysis of drawn poly(ethyleneterephthalate) and poly(amide) films
    Amsterdam : Elsevier
    Thermochimica Acta 61 (1983), S. 161-168 
    Details
    ISSN: 0040-6031
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0040-6031(83)80312-8
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  • 10
    Electronic Resource
    Electronic Resource
    A new banded texture in sheared thermotropic liquid crystalline polymers (1990)
    Springer
    Journal of materials science 25 (1990), S. 1548-1550 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Liquid crystalline polymers (LCP) often show after a shearing procedure a so-called banded texture as reported in the literature. The appearance of the banded texture is mainly influenced by the chemical structure of the LCP, the shear rate and the thickness of the layer. In addition to the well known banded texture a particular tractor texture (or herring-bone texture) can be obtained. By subsequent annealing of the sheared specimens at elevated temperatures the banded texture can be changed, especially in dependence on the thickness of the sheared layer. In some cases the banded texture remains unchanged, whereas in other cases it is transformed into a domain structure or into spherulites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01045349
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