Polypropylene/clay nanocomposites: Effect of different clays and compatibilizers on their morphology

被引：0

作者：

Palza, Humberto ^{[1
,2
]}

Vergara, Rodrigo ^{[2
]}

Yazdani-Pedram, Mehrdad ^{[2
,3
]}

Quijada, Raúl ^{[1
,2
]}

机构：

[1] Departamento de Ingeniería Química y Bioiecnología, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Beauchef 861, Santiago, Chile

[2] Centro para la Invest. Interdisciplinaria Avanzada en Cie. de los Mat. (CIMAT), Universidad de Chile, Av. Blanco Encalada 2008, Santiago, Chile

[3] Departamento de Química Orgánica y Fisicoquímica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Olivos 1007, Santiago, Chile

来源：

Journal of Applied Polymer Science | 2009年 / 112卷 / 03期

关键词：

A set of organically modified clays (OLS) were mixed with different compatibilizers to alter their interactions with either homopolymer or heterophasic polypropylenes when they were melt-mixed; and the relation between the OLS/compatibilizer system and the composite morphology was studied. X-ray diffraction (XRD) showed that depending on the specific OLS/compatibilizer system; it is possible to obtain several morphologies in the composites. In particular; some samples prepared with compatibilizers based on itaconic acid and OLSs; which had the highest cation exchange capacity and were organically modified with a set of quaternary ammonium salts; presented longer clay interlayer distances than the original OLSs; whereas other composites showed a clay collapse associated with shorter interlayer distances. Moreover; some composites presented both kinds of morphologies together. By means of diffuse reflectance spectroscopy and thermogravimetric analysis; it was possible to show that the OLSs were stable under the operating conditions; so the decrease in the interlayer distance found in some samples was not related to degradation processes. On the other hand; high-resolution transmission electron microscopy (HR-TEM) showed that collapsed clays were formed by tac-toid and immiscible structures with poor dispersion in the polymer matrix. However; samples with intercalate state from XRD presented very well dispersed multilayer stacks about 10 nm thick. Finally; those samples with both collapsed and intercalate morphologies presented tactoid and immiscible structures together with well dispersed multilayer stacks in the corresponding HR-TEM images. © 2009 Wiley Periodicals; Inc;

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学科分类号：

摘要：

Journal article (JA)

引用

页码：1278 / 1286

共 14 条

[1] Effect of some compatibilizing agents on clay dispersion of polypropylene-clay nanocomposites
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[3] Morphology and melt rheology of nylon 11/clay nanocomposites
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[5] Morphology and properties of silane-modified montmorillonite clays and clay/PBT composites
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[10] Polypropylene/natural rubber thermoplastic elastomer: Effect of phenolic resin as a vulcanizing agent on mechanical properties and morphology
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