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Type: Artigo de periódico
Title: Poly(phenylsilsesquioxane)s: Structural and morphological characterization
Author: Prado, LASD
Radovanovic, E
Pastore, HO
Yoshida, IVP
Torriani, IL
Abstract: Poly(phenylsilsesquioxane) (PPSQ) polymers that were obtained from different synthetic routes were comparatively studied. The polymers were characterized by infrared and solid-state Si-29 NMR spectroscopies. According to the results of X-ray diffraction and thermogravimetric analyses, the materials richest in silanol showed a less organized network and lower weight loss temperature. The morphology of the products was influenced by the preparation conditions. PPSQ, with a morphology rich in spherical particles, was achieved with an n-hexadecyltrimethylammonium bromide template in the reaction medium, whereas the morphology of this polymer obtained in the absence of the template was featureless. Small-angle X-ray scattering analyses revealed that the PPSQ samples showed a predominance of surface-fractal behavior. (C) 2000 John Wiley & Sons, Inc.
Subject: poly(phenylsilsesquioxane)
thermal stability
structural characterization
Country: EUA
Editor: John Wiley & Sons Inc
Rights: fechado
Identifier DOI: 10.1002/(SICI)1099-0518(20000501)38:9<1580
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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