Blend Morphology of Linear Low Density Polyethylene and Polystyrene in a Non-Intermeshing Twin Screw Extruder
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L.-Y. Yang
Abstract
Morphology development was investigated during blending of linear low density polyethylene (LLDPE) and polystyrene (PS) (the minor phase) in a tangential counter-rotating twin screw extruder, with and without the use of 5 wt.-% Kraton styrene-ethylene/butylene-styrene (SEBS) triblock copolymers as compatibilizing agents. Dispersive mixing in the Non-Intermeshing Twin Screw Extruder (NITSE) is improved with an increase of percent drag flow up to 50 %; the screws configuration includes reverse flight elements and/or cylinders. Experiments have indicated that the combined effect of the reverse flight elements and cylinders increases the reduction rate of droplets due to a longer time in the feed screw where the most significant changes of phase morphology occur. Screw stagger has been shown to have a minor effect on the phase scale of the final dispersion. The more significant reduction of the phase scale is achieved by increasing screw speed under constant flow conditions.
© 1997, Carl Hanser Verlag, Munich
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- Editorial
- Screw Extrusion
- Upgrading Recycled HDPE by Rheometer-Controlled Crosslinking
- Blend Morphology of Linear Low Density Polyethylene and Polystyrene in a Non-Intermeshing Twin Screw Extruder
- Mixing
- A Study on the Reactive Compatibilization of a PBT/LCP Blend: Catalyst Effect
- Influence of Processing Temperature on the Morphological and Mechanical Properties of a PC/TLCP Blend
- Fibers
- The Effect of Drawing and Annealing Conditions on the Structure and Properties of Bacterial Poly(3-hydroxybutyrate-co-3 hydroxyvalerate) Fibers
- Numerical Analysis of Cooling Air Systems in Film Blowing
- Moulding
- On the Simulation of Thermoplastic Injection Moulding Process
- Molding
- Rheology of Layered Thermoplastic Matrix Composites during Compression Molding
- Studies of the Trans-Quinacridone Nucleation of Poly-(ethylene-b-propylene)
- The Role of Long Molecules and Nucleating Agents in Shear Induced Crystallization of Isotactic Polypropylenes**
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- Editorial
- Screw Extrusion
- Upgrading Recycled HDPE by Rheometer-Controlled Crosslinking
- Blend Morphology of Linear Low Density Polyethylene and Polystyrene in a Non-Intermeshing Twin Screw Extruder
- Mixing
- A Study on the Reactive Compatibilization of a PBT/LCP Blend: Catalyst Effect
- Influence of Processing Temperature on the Morphological and Mechanical Properties of a PC/TLCP Blend
- Fibers
- The Effect of Drawing and Annealing Conditions on the Structure and Properties of Bacterial Poly(3-hydroxybutyrate-co-3 hydroxyvalerate) Fibers
- Numerical Analysis of Cooling Air Systems in Film Blowing
- Moulding
- On the Simulation of Thermoplastic Injection Moulding Process
- Molding
- Rheology of Layered Thermoplastic Matrix Composites during Compression Molding
- Studies of the Trans-Quinacridone Nucleation of Poly-(ethylene-b-propylene)
- The Role of Long Molecules and Nucleating Agents in Shear Induced Crystallization of Isotactic Polypropylenes**
