https://repositorio.ufba.br/handle/ri/8297
Campo DC | Valor | Idioma |
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dc.contributor.author | Esperidião, Maria Cecília Azevedo | - |
dc.contributor.author | Galembeck, Fernando | - |
dc.creator | Esperidião, Maria Cecília Azevedo | - |
dc.creator | Galembeck, Fernando | - |
dc.date.accessioned | 2013-01-31T13:20:16Z | - |
dc.date.issued | 1997 | - |
dc.identifier.issn | 0014-3057 | - |
dc.identifier.uri | http://www.repositorio.ufba.br/ri/handle/ri/8297 | - |
dc.description | Texto completo: acesso restrito. p.1387–1393 | pt_BR |
dc.description.abstract | The fast precipitation of mixtures of low-density polyethylene (LDPE) with ethylene-propylene-diene terpolymer (EPDM) and ethylene-vinyl acetate (EVA) copolymer, from xylene solutions by cooling, leads to fractionation of the mixtures. LDPE/EPDM mixtures are also fractionated by cooling followed by nonsolvent addition. Studies by density-gradient centrifugation, IR spectroscopy, optical microscopy and wide-angle X-ray diffraction showed that the composition and morphology of LDPE/EPDM fractions depend on the precipitation procedures. LDPE crystalline structure in each fraction is different, changes with the time and depends on EPDM content. EVA fractions that co-precipitate are richer in -CH2-CH2-units. LDPE/EPDM and LDPE/EVA precipitates showed chemical composition distribution and morphological characteristics different among themselves. Larger aggregates were observed in the LDPE/EPDM precipitates. These differences were attributed to differences in the phase diagrams and in the phase separation mechanisms. | pt_BR |
dc.language.iso | en | pt_BR |
dc.source | http://dx.doi.org/10.1016/S0014-3057(96)00245-5 | pt_BR |
dc.title | Precipitation of LDPE-EPDM and LDPE-EVA mixtures from ternary solutions | pt_BR |
dc.title.alternative | European Polymer Journal | pt_BR |
dc.type | Artigo de Periódico | pt_BR |
dc.identifier.number | v.33, n. 8 | pt_BR |
dc.embargo.liftdate | 10000-01-01 | - |
Aparece nas coleções: | Artigo Publicado em Periódico (Química) |
Arquivo | Descrição | Tamanho | Formato | |
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ESPERIDIão.pdf Restricted Access | 867,52 kB | Adobe PDF | Visualizar/Abrir Solicitar uma cópia |
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