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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/8643

Title: Precipitation of polypropylene and of high-density polyethylene from stirred, binary solutions
Other Titles: European Polymer Journal
Authors: Esperidião, Maria Cecília Azevedo
Galembeck, Fernando
Issue Date: 1993
Abstract: The precipitation of polypropylene (PP) and of high-density polyethylene (HDPE) from decalin solutions, under stirring, yields two polymer-rich phases, one of which is globular and the other is fibrous. Infrared spectra, X-ray diffractograms, optical microscopy and DSC curves showed that the fibrous PP precipitate is richer in stereoregular polymer and yields films more resistant to recrystallization than the globular precipitate. The fibrous HDPE precipitate has a higher methylene/methyl ratio and a higher crystallinity than the globular precipitate. These results are consistent with the predictions of reduced flexibility and stored free-energy formalisms.
Description: Texto completo: acesso restrito. p.987–991
URI: http://www.repositorio.ufba.br/ri/handle/ri/8643
ISSN: 0014-3057
Appears in Collections:Artigos Publicados em Periódicos (Quimica)

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