Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    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
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    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
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Orientation analysis of uniaxially drawn polycarbonate films, doped with fluorescent molecules, by UV-dichroism, fluorescence polarization and birefringence (1984)
    Springer
    Colloid & polymer science 262 (1984), S. 46-50 
    Details
    ISSN: 1435-1536
    Keywords: Dichroism ; fluorescence polarization ; birefringence ; fluorescent probes ; polycarbonate
    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 Bis-phenol-A-polycarbonate (PC) is dyed in solution with fluorescent molecules of different shapes and cast to films. Rectangular samples, cut from these films, are drawn varying draw ratio and drawing temperature. The orientation of the fluorescent probes is investigated by dichroism and fluorescence polarization, that of the polymer segments by birefringence. Hermans' orientation factors obtained by dichroism and fluorescence polarization are in good agreement. Long rodlike fluorescent molecules exhibit greater orientation factors than smaller ones. The correlation between segmental and probe orientation is discussed. Keeping the birefringence constant, the probe orientation factors depend on drawing temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01422576
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...