Skip navigation
Universidade Federal da Bahia |
Repositório Institucional da UFBA
Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/14139
Registro completo de metadados
Campo DCValorIdioma
dc.contributor.authorEsperidião, Maria Cecília Azevedo-
dc.creatorEsperidião, Maria Cecília Azevedo-
dc.date.accessioned2013-12-13T12:16:51Z-
dc.date.issued2003-
dc.identifier.issn0888-5885-
dc.identifier.urihttp://repositorio.ufba.br/ri/handle/ri/14139-
dc.descriptionTexto completo: acesso restrito. p. 5819-5826pt_BR
dc.description.abstractPolymer−surface interactions in flowing systems were studied using an attenuated total reflectance Fourier transform infrared spectroscopy technique. The absorbance of deuterated polyethylene, d-PE66 (Mw = 6.60 × 104) and d-PE112 (Mw = 1.12 × 105), near the surface of a flat zinc selenide crystal was followed as it was replaced by linear low-density polyethylene (Mw = 1.07 × 105). The experiments were performed under wall stresses of 0.090, 0.134, and 0.155 MPa using a rectangular flow channel formed by a ZnSe crystal and an aluminum block. The decay profiles depended on the molecular weight distribution, the chemical composition distribution, and the shear stress. For d-PE112, the decay profiles suggest that slip is due to a cohesive failure. For d-PE66, the slip mechanism appeared to be due to adhesive failure. For d-PE112 with larger and regular chains, an immobile layer forms whose thickness (12−17 nm) depended on the wall shear stress.pt_BR
dc.language.isoenpt_BR
dc.rightsAcesso Abertopt_BR
dc.sourcehttp://dx.doi.org/ 10.1021/ie030106dpt_BR
dc.titleChain-Exchange Dynamics at a Polymer−Solid Interface:  effects of Polydispersity and Shear Stress on Linear Low-Density Polyethylene Flowpt_BR
dc.title.alternativeIndustrial and Engineering Chemistry Researchpt_BR
dc.typeArtigo de Periódicopt_BR
dc.identifier.numberv. 42, n. 3pt_BR
dc.embargo.liftdate10000-01-01-
Aparece nas coleções:Artigo Publicado em Periódico (Química)

Arquivos associados a este item:
Não existem arquivos associados a este item.
Mostrar registro simples do item Visualizar estatísticas


Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.