Organo-modified montmorillonite/poly(ɛ-caprolactone) nanocomposites prepared by melt intercalation in a twin-screw extruder - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Polymer Degradation and Stability Année : 2010

Organo-modified montmorillonite/poly(ɛ-caprolactone) nanocomposites prepared by melt intercalation in a twin-screw extruder

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Résumé

Nanocomposites based on biodegradable poly(ɛ-caprolactone) organo-modified clay have been prepared by melt intercalation using a twin-screw extruder. The screw configuration developed allowed us to obtain an intercalated/exfoliated nanocomposite structure using a modified montmorillonite containing no polar groups, in contrast to previous work using mainly alkyl ammonium containing hydroxyl polar groups in poly(ɛ-caprolactone). Montmorillonite nanocomposites were prepared using a specific extrusion profile from a 30 wt% masterbatch of organo-modified clay, which was then diluted at 1, 3 and 5%. Intercalated and/or exfoliated nanocomposites structures were assessed using rheological procedures and confirmed by transmission electron microscopy analysis. Mechanical and thermal properties were found to be strongly dependent on morphology and clay percentage. Crystallinity was only slightly affected by the clay addition. Effect of exfoliation on Young's modulus and thermal stability was investigated. Young's modulus increased significantly and onset degradation temperature measured by TGA was significantly reduced for an exfoliated nanocomposite composition containing 5 wt% organoclay.
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Dates et versions

hal-02536562 , version 1 (17-04-2020)

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Sami Labidi, Nathalie Azéma, Didier Perrin, José-Marie Lopez-Cuesta. Organo-modified montmorillonite/poly(ɛ-caprolactone) nanocomposites prepared by melt intercalation in a twin-screw extruder. Polymer Degradation and Stability, 2010, 95 (3), pp.382-388. ⟨10.1016/j.polymdegradstab.2009.11.013⟩. ⟨hal-02536562⟩
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