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dc.contributor.authorFarias, Thais Machadopt_BR
dc.contributor.authorCardozo, Nilo Sérgio Medeirospt_BR
dc.contributor.authorSecchi, Argimiro Resendept_BR
dc.date.accessioned2015-04-11T02:01:06Zpt_BR
dc.date.issued2013pt_BR
dc.identifier.issn0104-6632pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/115204pt_BR
dc.description.abstractThe molecular weight distribution (MWD) and its parameters are of the fundamental importance in the characterization of polymers. Therefore, the development of techniques for faster MWD determination is a relevant issue. This paper aims at implementing one of the relaxation models from double reptation theory proposed in the literature and analyzing the numeric strategy for the evaluation of the integrals appearing in the relaxation model. The inverse problem, i.e., the determination of the MWD from rheological data using a specified relaxation model and an imposed distribution function was approximated. Concerning the numerical strategy for the evaluation of the integrals appearing in the relaxation models, the use of Gauss-Hermite quadrature using a new change of variables was proposed. In the test of samples of polyethylene with polydispersities less than 10, the application of this methodology led to MWD curves which provided a good fit of the experimental SEC data.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofBrazilian journal of chemical engineering. São Paulo. Vol. 30, n. 4 (Oct./Dec. 2013), p. 909-921pt_BR
dc.rightsOpen Accessen
dc.subjectPolímerospt_BR
dc.subjectRheologyen
dc.subjectInverse problemen
dc.subjectReologiapt_BR
dc.subjectGauss-Hermite quadratureen
dc.titleThe use of gauss-hermite quadrature in the determination of the molecular weight distribution of linear polymers by rheometrypt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000956087pt_BR
dc.type.originNacionalpt_BR


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