Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/70766
Type: Artigo de periódico
Title: POLYPROPYLENE (HIGH-DENSITY POLYETHYLENE) PRECIPITATION FROM STIRRED SOLUTIONS
Author: ESPERIDIAO, MCA
GALEMBECK, F
Abstract: The fast precipitation of mixtures of polypropylene (PP) with high density polyethylene (HDPE) from decalin solutions is affected by the stirring rate of the solutions. With fast stirring, two types of precipitates were obtained viz. globules dispersed in the liquid phase and fibres adhering to the stirrer. Studies by i.r., WAXD, DSC and optical microscopy indicated that the fibrous precipitate is more birefringent, richer in HDPE and richer in the PP fractions with higher isotactic helical content than the globular precipitate. The dried precipitates recrystallize during storage. HDPE undergoes ''pseudo-monoclinic''-orthorhombic solid state phase transition.
Country: Inglaterra
Editor: Pergamon-elsevier Science Ltd
Rights: fechado
Identifier DOI: 10.1016/0014-3057(93)90298-T
Date Issue: 1993
Appears in Collections:Unicamp - Artigos e Outros Documentos

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