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metadata.dc.type: | Artigo de Periódico |
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 |
metadata.dc.creator: | Esperidião, Maria Cecília Azevedo Galembeck, Fernando |
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. |
URI: | http://www.repositorio.ufba.br/ri/handle/ri/8643 |
Issue Date: | 1993 |
Appears in Collections: | Artigo Publicado em Periódico (Química) |
Files in This Item:
File | Description | Size | Format | |
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Esperidão.pdf Restricted Access | 918,73 kB | Adobe PDF | View/Open Request a copy |
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