Orientierung und Bewegungsverhalten von Fluoreszenzsonden in nichtkristallinen Bereichen verstreckter Polyethylenfolien
✍ Scribed by Fuhrmann, Jürgen ;Hennecke, Manfred
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1980
- Weight
- 917 KB
- Volume
- 181
- Category
- Article
- ISSN
- 0025-116X
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✦ Synopsis
Abstract
Investigations of molecular orientation and mobility within non‐crystalline regions of semicrystalline polymers yield different results depending on the experimental method used. Starting from criteria classifying the measured specific polymer property, the polarized fluorescence method is applied to investigate low density polyethylene during drawing. The measured orientation factors coincide with results acquired by other methods if the geometry of the fluorescent probe and the type of indication within the non‐crystalline regions are considered. Fluorescent probes, the quantum yield of which is enhanced in deformed, rheologically effective microregions within the non‐crystalline regions during drawing, allow to separate between the orientation and cooperative mechanism of displacement in these microregions and the behaviour of the unaffected part of the non‐crystalline phase. The volume fraction of the rheologically effective microregions is estimated. Fluorescent probes yield polymer informations, which can be understood as a result of averaging the orientation and mobility behaviour of the adjacent polymer chains.