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Polímeros

versão impressa ISSN 0104-1428

Resumo

PAZ, Renê A. da et al. Polyamide 6/organoclay nanocomposites: evaluation of thermal behavior of injection molded samples by DSC. Polímeros [online]. 2010, vol.20, n.4, pp.258-263.  Epub 12-Nov-2010. ISSN 0104-1428.  https://doi.org/10.1590/S0104-14282010005000043.

Polyamide 6/organoclay nanocomposites were prepared using the melt intercalation technique. The clay was treated with a quaternary ammonium salt (Cetremide) to obtain the organoclay (OMMT), which was characterized with X ray fluorescence (XRF), Infrared Spectroscopy (FTIR) and X ray diffraction (XRD). The results of these analyses showed the incorporation of the salt in the clay structure, confirming the organophilization. The nanocomposites were obtained in a co-rotational twin screw extruder with 3 wt. (%) of clay, and then the pellets were injection molded. The characterization by XRD of the nanocomposites showed an exfoliated and/or partially exfoliated structure. The analysis by DSC were made in the skin and core regions of the samples, showing the α and γ-crystalline forms in the skin and only the α-form in the core region. The degree of crystallinity in the skin was lower than in the core.

Palavras-chave : Polyamide 6; organoclay; nanocomposites; crystallization.

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