Nanocompósitos de PVC com argilas organofílicas / PVC nanocomposites with organoclays

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

21/12/2009

RESUMO

Polymer/ inorganic filler composite materials have increasingly attracted the attention of scientific community and industry over the past years due to their relatively ease of production and the possibility of obtaining unique properties as a result of these combinations. Simultaneously, recent advances in chemistry, physics and materials engineering have provided powerful nanostructured materials developments, such as the so-called polymer nanocomposites, hybrid materials in which at least one of the components has nanometric dimensions. One of the clear advantages of nanocomposites is the possibility of using small amounts of reinforcing agents in comparison with regular composites, which allows manufacturers to achieve in many cases excellent cost / performance ratios. Aligned with this trend, the development of PVC nanocomposites is a strongly growing research field over the past years, especially in the case of layered silicates as reinforcements. This increasing interest is the consequence of improvements in characteristics like stiffness, impact strength and thermal properties, in spite of low clay concentrations. Results so far obtained for PVC/ clay nanocomposites are rather promising, especially regarding polymer matrix tenacity and increases in both rigidity and thermal properties (Vicat, Tg and HDT). Rigid PVC/ clay nanocomposites were prepared using the melt blending technique and then characterized with the purpose of evaluating the influence of polymer molecular weight, type and clay concentration, processing conditions and additives on mechanical, physical and thermal properties of the final materials.

ASSUNTO(S)

outros nanocompósitos pvc argilas montmorilonitas nanocomposites pvc clays montmorilonites

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