ISSN:
1435-1536
Schlagwort(e):
Dichroism
;
fluorescence polarization
;
birefringence
;
fluorescent probes
;
polystyrene
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
,
Maschinenbau
Notizen:
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.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01410386
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