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Titolo:
Is it a modacrylic fibre?
Autore:
Grieve, MC; Griffin, RME;
Indirizzi:
Bundeskriminalamt, Forens Sci Inst KT 33, D-65193 Wiesbaden, Germany Bundeskriminalamt Wiesbaden Germany D-65193 , D-65193 Wiesbaden, Germany Forens Sci Agcy No Ireland, Carrickfergus BT38 8PL, North Ireland Forens Sci Agcy No Ireland Carrickfergus North Ireland BT38 8PL Ireland
Titolo Testata:
SCIENCE & JUSTICE
fascicolo: 3, volume: 39, anno: 1999,
pagine: 151 - 162
SICI:
1355-0306(199907/09)39:3<151:IIAMF>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACRYLIC FIBERS; IDENTIFICATION; RECOGNITION;
Keywords:
forensic science; fibres; modacrylic; microscopy (brightfield, polarised light, FTIR); density; cross sections;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
16
Recensione:
Indirizzi per estratti:
Indirizzo: Grieve, MC Bundeskriminalamt, Forens Sci Inst KT 33, Thaerstr 11, D-65193 Wiesbaden, Germany Bundeskriminalamt Thaerstr 11 Wiesbaden Germany D-65193ermany
Citazione:
M.C. Grieve e R.M.E. Griffin, "Is it a modacrylic fibre?", SCI JUSTICE, 39(3), 1999, pp. 151-162

Abstract

This study describes the characteristics of modacrylic fibres and includesover 80 samples (previous and current) representing 15 trade names. Fibre morphology was examined using brightfield microscopy. Signs of elongation were determined using polarised light microscopy. Fibre cross sections were also examined. The generic class of fibre was divided into sub groups usingpolymer composition as determined by FTIR-microscopy. Microscopically, some modacrylic fibres cannot be distinguished from acrylic fibres. Others display unusual optical and morphological features which are a strong indication of their generic class. The infrared spectra provide information about the co-monomer, termonomers added to produced dye sites, the presence of solvent residue, dyes, and additives, e.g. flame retardant material. The infrared spectra should always be recorded before and after any thin layer chromatographic examination of the dye, otherwise peaks attributable to dyes, which may be a valuable comparative feature in casework will be lost.

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Documento generato il 18/09/20 alle ore 10:04:12