Reference : Dichroism measurements in forensic fibre examination: Part 5—Pigmented fibres
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
http://hdl.handle.net/2268/132720
Dichroism measurements in forensic fibre examination: Part 5—Pigmented fibres
English
De Wael, K. []
Lepot, Laurent mailto [Université de Liège - ULg > > > Doct. sc. (chimie - Bologne)]
Sep-2012
Science & Justice : Journal of the Forensic Science Society
Forensic Science Society
52
3
161-167
Yes (verified by ORBi)
International
1355-0306
Harrogate
United Kingdom
[en] Dichroism ; Pigments ; Man-made fibres ; Microspectrophotometry (MSP) ; Fibre examination
[en] A number of pigmented fibre samples were examined with plane polarized light on their dichroic behaviour by optical light microscopy (OLM) and microspectrophotometry with plane polarized light (MSP-PPL). It was found that about half of the samples show a strong dichroic effect and another 20% have a weak dichroism. Both regular (80%) and inversed dichroic effects (20%) occur. The dichroic characteristics of pigmented fibres can be compared to these of sheet polarizers. It is suggested that the dichroic behaviour of pigmented fibres depends strongly on the crystal structure (shape of the pigment grains) and the draw ratio (orientation of the polymer chains).
http://hdl.handle.net/2268/132720
10.1016/j.scijus.2011.10.002

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