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Type: Artigo de periódico
Title: Bicontinuous networks made of polyphosphates and of thermoplastic polymers
Author: deSouza, EF
Bezerra, CC
Galembeck, F
Abstract: Composite films are obtained by casting aqueous dispersions obtained by admixture of PVAc or styrene-acrylic latexes with aluminium or iron polyphosphate powders. Film extraction with solution of aqueous EDTA (a solvent for polyphosphate) yields a dense polymer film, but using a polymer solvent (chloroform) a porous monolithic solid is obtained. Composite and solvent-extracted films were characterized by SEM coupled to energy dispersive X-ray analysis, and by Raman microspectrophotometry. The results from morphological, spectral and gravimetric experiments show that the cast films are bicontinuous, indicating a strong compatibility of the organic and inorganic phases. This is assigned to ionic bonds at the interfaces, in which aluminium ions act as bridging groups. (C) 1997 Elsevier Science Ltd.
Subject: polyphosphate-polymer composites
polymer latex
Country: Inglaterra
Editor: Elsevier Sci Ltd
Rights: fechado
Date Issue: 1997
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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