Analytical and Bioanalytical Chemistry

, Volume 400, Issue 10, pp 3331–3340

Laser-induced breakdown spectroscopy for polymer identification

  • Sylvain Grégoire
  • Marjorie Boudinet
  • Frédéric Pelascini
  • Fabrice Surma
  • Vincent Detalle
  • Yves Holl
Original Paper

Abstract

This study aims at differentiating several organic materials, particularly polymers, by laser induced breakdown spectroscopy. The goal is to apply this technique to the fields of polymer recycling and cultural heritage conservation. We worked with some usual polymers families: polyethylene (PE), polypropylene (PP), polyoxymethylene, (POM), poly(vinyl chloride), polytetrafluoroethylene, polyoxyethylene (POE), and polyamide for the aliphatic ones, and poly(butylene terephthalate), acrylonitrile–butadiene–styrene, polystyrene, and polycarbonate for the aromatic ones. The fourth harmonic of a Nd:YAG laser (266 nm) in ambient air at atmospheric pressure was used. A careful analysis of the C2 Swan system (0,0) band in polymers containing no C–C (POM), few C–C (POE), or aromatic C–C linkages led us to the conclusion that the C2 signal might be native, i.e., the result of direct ablation from the sample. With use of these results, aliphatic and aromatic polymers could be differentiated. Further data treatments, such as properly chosen line ratios, principal component analysis, and partial least squares regression, were evaluated. It was shown that many polymers could be separated, including PE and PP, despite their similar chemical structures.

Figure

LIBS analysis for cultural heritage conservation

Keywords

Laser induced breakdown spectroscopy (LIBS) Polymer recycling Cultural heritage Molecular signal Chemometrics Principal component analysis Partial least squares 

Abbreviations

ABS

acrylonitrile–butadiene–styrene

ICCD

intensified charge-coupled device

LIBS

laser induced breakdown spectroscopy

NIR

near IR

PA

polyamide

PBT

poly(butylene terephthalate)

PC

polycarbonate

PCA

principal component analysis

PdMS

polydimethylsiloxane

PE

polyethylene

PLS

partial least squares

POE

polyoxyethylene

POM

polyoxymethylene

PP

polypropylene

PS

polystyrene

PTFE

polytetrafluoroethylene

PVC

poly(vinyl chloride)

SNR

signal-to-noise ratio

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Sylvain Grégoire
    • 1
    • 2
  • Marjorie Boudinet
    • 1
  • Frédéric Pelascini
    • 1
  • Fabrice Surma
    • 1
  • Vincent Detalle
    • 2
  • Yves Holl
    • 3
  1. 1.CRITT Matériaux AlsaceSchiltigheimFrance
  2. 2.Laboratoire de Recherche des Monuments HistoriquesChamps-sur-MarneFrance
  3. 3.Institut Charles SadronCNRS and University of StrasbourgStrasbourg CedexFrance

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