Effect of pulse repetition rate and number of pulses in the analysis of polypropylene and high density polyethylene by nanosecond infrared laser induced breakdown spectroscopy

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dc.contributor.authorLeme, Flavio O.
dc.contributor.authorGodoi, Quienly
dc.contributor.authorKiyataka, Paulo H. M.
dc.contributor.authorSantos Junior, Dário [UNIFESP]
dc.contributor.authorAgnelli, Jose A. M.
dc.contributor.authorKrug, Francisco J.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionInst Tecnol Alimentos
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.date.accessioned2016-01-24T14:17:49Z
dc.date.available2016-01-24T14:17:49Z
dc.date.issued2012-02-01
dc.description.abstractPulse repetition rates and the number of laser pulses are among the most important parameters that do affect the analysis of solid materials by laser induced breakdown spectroscopy, and the knowledge of their effects is of fundamental importance for suggesting analytical strategies when dealing with laser ablation processes of polymers. in this contribution, the influence of these parameters in the ablated mass and in the features of craters was evaluated in polypropylene and high density polyethylene plates containing pigment-based PbCrO4. Surface characterization and craters profile were carried out by perfilometry and scanning electron microscopy. Area, volume and profile of craters were obtained using Taylor Map software. A laser induced breakdown spectroscopy system consisted of a Q-Switched Nd:YAG laser (1064 nm, 5 ns) and an Echelle spectrometer equipped with ICCD detector were used. the evaluated operating conditions consisted of 10, 25 and 50 laser pulses at 1, 5 and 10 Hz, 250 mJ/pulse (85 J cm(-2)), 2 mu s delay time and 6 mu s integration time gate. Differences in the topographical features among craters of both polymers were observed. the decrease in the repetition rate resulted in irregular craters and formation of edges, especially in polypropylene sample. the differences in the topographical features and ablated masses were attributed to the influence of the degree of crystallinity, crystalline melting temperature and glass transition temperature in the ablation process of the high density polyethylene and polypropylene. It was also observed that the intensities of chromium and lead emission signals obtained at 10 Hz were two times higher than at 5 Hz by keeping the number of laser pulses constant. (C) 2011 Elsevier B. V. All rights reserved.en
dc.description.affiliationUniv São Paulo, Lab Quim Analit Henrique Bergamin Filho, Ctr Energia Nucl Agr, BR-13416000 Piracicaba, SP, Brazil
dc.description.affiliationUniv Fed Sao Carlos, Dept Quim, BR-13565905 Sao Carlos, SP, Brazil
dc.description.affiliationInst Tecnol Alimentos, Ctr Tecnol Embalagens, BR-13070178 Campinas, SP, Brazil
dc.description.affiliationUniversidade Federal de São Paulo, Dept Ciencias Exatas & Terra, BR-09972270 Diadema, SP, Brazil
dc.description.affiliationUniv Fed Sao Carlos, Dept Engn Mat, BR-13565905 Sao Carlos, SP, Brazil
dc.description.affiliationUnifespUniversidade Federal de São Paulo, Dept Ciencias Exatas & Terra, BR-09972270 Diadema, SP, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIDCNPq: 140879/2008-0
dc.description.sponsorshipIDCNPq: 305913/2009-3
dc.description.sponsorshipIDFAPESP: 07/01052-3
dc.format.extent3598-3603
dc.identifierhttp://dx.doi.org/10.1016/j.apsusc.2011.11.122
dc.identifier.citationApplied Surface Science. Amsterdam: Elsevier B.V., v. 258, n. 8, p. 3598-3603, 2012.
dc.identifier.doi10.1016/j.apsusc.2011.11.122
dc.identifier.fileWOS000300185800041.pdf
dc.identifier.issn0169-4332
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/34540
dc.identifier.wosWOS:000300185800041
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofApplied Surface Science
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rights.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.subjectLIBSen
dc.subjectLaser induced breakdown spectroscopyen
dc.subjectLaser pulse repetition rateen
dc.subjectCraters characterizationen
dc.subjectHigh density polyethyleneen
dc.subjectPolypropyleneen
dc.titleEffect of pulse repetition rate and number of pulses in the analysis of polypropylene and high density polyethylene by nanosecond infrared laser induced breakdown spectroscopyen
dc.typeinfo:eu-repo/semantics/article
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