Effect of the Organoclay Structure on Morphology and Rheological Response of PBT Nanocomposites

Macromolecular Symposia - Tập 228 Số 1 - Trang 125-138 - 2005
Paola Scarfato1, L. Scatteia2, G. Costa3, Domenico Acierno4
1Department of Chemical and Food Engineering, University of Salerno, Via Ponte don Melillo, 84084 Fisciano (SA), Italy
2Advanced Materials and Manufacturing Technologies ‐ CIRA – Italian Aerospace Research Center, Capua (CE), Italy
3ISMAC, Italy's National Council of Research, Via De Marini, 6 – Torre di Francia – 16149 Genova, Italy
4Department of Material and Production Engineering, University of Naples “Federico II”, P.le Tecchio 80, 80125 Napoli, Italy

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AbstractIn this paper the effect of different organoclays on the structure and the rheological properties of poly(butyleneterephtalate)–clay nanocomposites produced by melt compounding was investigated. The study was carried out using as nanometric fillers four commercial montmorillonites, treated with different organic modifiers and having similar interlayer spacing and organo‐modifier concentration. Each organoclay was melt compounded with PBT (at 3%, 6% and 9% by weight of clay) using a twin screw extruder. Using the same processing conditions, hybrid samples containing the unmodified silicate were also prepared for comparison purposes. All the obtained nanocomposite samples were submitted to physico‐chemical (XRD, TEM and FT‐IR), and rheological measurements in order to evidence the role of polymer‐clay affinity on the morphology and on the viscoelastic response of the materials. The results have pointed out that, with the used processing conditions, all nanocomposites exhibit a mixed intercalated/exfoliated structure; nevertheless, the clay dispersion homogeneity and the exfoliation level reached in the samples are higher for Nanofil 919 and Dellite 43B fillers, the organic modifiers of which may favorably interact with PBT matrix.

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Macromolecular Symposia

Tập 228 Số 1

125-138

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