Melt Compounding of Polymeric Nanocomposites
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L. A. Utracki
Abstract
The clay-containing polymeric nanocomposites (CPNC) can be visualized as binary mixtures of strongly interacting, inorganic, plate-like molecules dispersed in a polymeric matrix. To be successful, one must ascertain the thermodynamics, which controls CPNC structure on the molecular level. In this work dispersion of organoclay (Cloisite 15A, C15A) in polyamide 6 (PA6) or in polypropylene (PP) is discussed. The PA-based CPNC's contained two components: polymer and organoclay, whereas those based on PP in addition contained a mixture of two maleated polypropylene's (PP-MA), as a compatibilizer. The melt compounding was carried out either in a single-screw extruder (SSE), or a twin-screw extruder (TSE). Both compounding lines were used with or without the extensional flow mixer (EFM). Furthermore, two versions of EFM were evaluated – one commercial, designed for polymer homogenization and blending, and the other designed for dispersing nano-particles. It was found that addition of EFM significantly improved clay dispersion. Better dispersion was found compounding the CPNC's in a SSE+EFM than in TSE with or without EFM. The best results were obtained using SSE with the new EFM having a relatively small gap between the convergent-divergent plates. C15A was fully exfoliated in PA6 matrix. The results in PP/PP-MA matrix were less spectacular, but again the highest degree of dispersion was obtained using SSE+new EFM with a small gap. Tensile, flexural and impact properties were measured and evaluated.
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© 2006, Hanser Publishers, Munich
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- Dedication of the Special Issue of International Polymer Processing in Honor of Prof. James Lindsay White, Editor Emeritus and Founding Editor
- Invited Papers
- Melt Compounding of Polymeric Nanocomposites
- Experiments and Analysis of Effect of Calender Gaps on Melting of PVC Powders in an Intermeshing Counter-rotating Twin-screw Extruder
- Quantitative Analysis for Polymer Degradation in the Extrusion Process
- Visualization of Flow Instabilities for High Density Polyethylene
- Heat Transfer through Metal Walls of Finite Thickness
- Simulation and Experimental Verification of Crystallization and Birefringence in Melt Spinning of PET
- Structural Development and Properties of Melt Spun Poly(butylene succinate) and Poly(butylene terephthalate-co-succinate-co-adipate) Biodegradable Fibers
- External Calibration in PA12 Tube Extrusion
- Tubular Film Extrusion Stability of Metallocene Linear Low Density Polyethylene
- Multilayer Barrier Film of Biaxially Oriented PA6/EVOH by Double Bubble Tubular Film Process
- PPS News
- PPS News
- Seikei-Kakou Abstracts
- Seikei-Kakou Abstracts
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- Dedication of the Special Issue of International Polymer Processing in Honor of Prof. James Lindsay White, Editor Emeritus and Founding Editor
- Invited Papers
- Melt Compounding of Polymeric Nanocomposites
- Experiments and Analysis of Effect of Calender Gaps on Melting of PVC Powders in an Intermeshing Counter-rotating Twin-screw Extruder
- Quantitative Analysis for Polymer Degradation in the Extrusion Process
- Visualization of Flow Instabilities for High Density Polyethylene
- Heat Transfer through Metal Walls of Finite Thickness
- Simulation and Experimental Verification of Crystallization and Birefringence in Melt Spinning of PET
- Structural Development and Properties of Melt Spun Poly(butylene succinate) and Poly(butylene terephthalate-co-succinate-co-adipate) Biodegradable Fibers
- External Calibration in PA12 Tube Extrusion
- Tubular Film Extrusion Stability of Metallocene Linear Low Density Polyethylene
- Multilayer Barrier Film of Biaxially Oriented PA6/EVOH by Double Bubble Tubular Film Process
- PPS News
- PPS News
- Seikei-Kakou Abstracts
- Seikei-Kakou Abstracts
