Resumo

RODOLFO JR., Antonio  e  MEI, Lucia H. I.. PVC/organically modified montmorillonite nanocomposites: effects of processing and clay incorporation methodology. Polímeros [online]. 2009, vol.19, n.1, pp.1-9. ISSN 1678-5169.  https://doi.org/10.1590/S0104-14282009000100006.

Nanocomposites of poly(vinyl chloride) (PVC) and an organically modified montmorillonite (O-MMT) were prepared using different production approaches to assess possible effects on the degree of clay intercalation/exfoliation. The morphology of the nanocomposites was studied using X ray diffratometry and transmission electron microscopy. Tensile properties and static thermal stability were also evaluated. Hybrid intercalated/partially exfoliated nanocomposites were obtained, regardless of whether the PVC compound was processed from the powder (dry blend) or granulated (extruded) samples, or of the methodology used for incorporation of O-MMT into the PVC compound (directly in the intensive mixer or pre-exfoliated in a hot mixture of DIDP/ESO). The plasticizers, present in the flexible PVC compound, exerted an important role in the process of intercalation and exfoliation of the clay, helping the formation of the nanocomposites.

Palavras-chave : PVC; poly(vinyl chloride); polymer/clay nanocomposites.

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