Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/70705
Type: Artigo de periódico
Title: Polymer-oxide adhesion: fabrication of a poly(dimethylsiloxane)/iron(III) oxide composite with a high compressive strength
Author: Vichi, FM
Galembeck, F
Abstract: Poly(dimethylsiloxane)/iron(III) oxide composite powders were obtained by thermal treatment of polymer-oxide mixtures. The composites present themselves as free-flowing powders, visually indistinguishable from the pure oxide. They are, however, highly hydrophobic and cannot be dispersed in polar solvents. Cylindrical test specimens were obtained by pressing a composite powder and heating it at two different temperatures. Specimens heated at 270 and 300 degrees C present compressive strengths of 1.19 x 10(7) and 1.55 x 10(6) N m(-2), respectively. Scanning electron microscopy of the fracture surfaces reveals the presence of silicone-rich domains, these being larger and more abundant in the specimens heated at 300 degrees C. These domains probably act as stress absorbent-dissipative sites which are responsible for the high compressive strength of the composites.
Subject: PDMS
iron(III) oxide
polymer-oxide adhesion
particle-particle adhesion
composite
compressive strength
Country: Holanda
Editor: Vsp Bv
Rights: fechado
Date Issue: 1999
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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