Rheological Behavior of Immiscible PS/PMMA Blends during Dynamic Plasticating Extrusion
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W. H. Luo
Abstract
PS/PMMA blends were prepared using a twin screw extruder and then extruded using an electromagnetic dynamic plasticating extruder equipped with a specially designed split die. During dynamic plasticating extrusion, the dynamic rheological behavior of PS/PMMA blends was investigated. The extrudates were cooled immediately and collected for morphology measurements using a scanning electron microscope (SEM). Results show that the average shear stress decreases with the introduction of vibration force field into the whole extrusion process, and reaches a minimum at the vibration amplitude of 0.15 mm and the vibration frequency of 5 Hz. At the same shear stress, the melt viscosity of the blend under dynamic plasticating extrusion is lower than that under static extrusion and decreases with vibration intensity. With increasing vibration intensity, the power-law index of the blend melt has a tendency to increase. The drop size of the dispersed phase in 25/75 PS/PMMA blend decreases at a faster rate with an increase of shear stress, compared with that in 75/25 PS/PMMA blends, correspondingly, the melt viscosity of 25/75 PS/PMMA blend has a stronger shear rate dependence. During dynamic plasticating extrusion, a negative deviation from the additivity rule is observed for the studied blend compositions.
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© 2008, Carl Hanser Verlag, Munich
Artikel in diesem Heft
- Contents
- Contents
- Regular Contributed Articles
- 10.3139/217.0979
- Polymer Plastication during Injection Molding
- Polymer Plastication during Injection Molding
- Challenges to the Formation of Nano-cells in Foaming Processes
- Manufacture of Spinnerets for Synthetic Micro-fibers by LIGA and Micro-injection Molding Technique
- Study of Solid-plug Conveying in a Centrifugal Extruder
- Experimental Study on the Sliding Friction and Wear Characteristics of Roller Burnished Polymers
- Studying the Effective Thermal Properties of Solids in Extrusion Machinery using a Discrete Particle Simulation Approach
- Polymer-ridge Waveguide Fabrication by Gas-assisted UV Embossing with a Soft Mold
- Rheological Behavior of Immiscible PS/PMMA Blends during Dynamic Plasticating Extrusion
- Rapid Fabrication of Microstructures onto Plastic Substrates by Infrared Hot Embossing
- Design of Calibrators for Profile Extrusion – Optimizing Multi-step Systems
- Inhibition of Thermal Oxidation Destruction of PBT/HDPE Blends by Organic Compounds of Five-valent Phosphorus
- Non-isothermal Model for the Drive Power Calculation of Single-screw Plasticating Units
- PPS News
- PPS News
- Seikei-Kakou Abstracts
- Seikei-Kakou Abstracts
Artikel in diesem Heft
- Contents
- Contents
- Regular Contributed Articles
- 10.3139/217.0979
- Polymer Plastication during Injection Molding
- Polymer Plastication during Injection Molding
- Challenges to the Formation of Nano-cells in Foaming Processes
- Manufacture of Spinnerets for Synthetic Micro-fibers by LIGA and Micro-injection Molding Technique
- Study of Solid-plug Conveying in a Centrifugal Extruder
- Experimental Study on the Sliding Friction and Wear Characteristics of Roller Burnished Polymers
- Studying the Effective Thermal Properties of Solids in Extrusion Machinery using a Discrete Particle Simulation Approach
- Polymer-ridge Waveguide Fabrication by Gas-assisted UV Embossing with a Soft Mold
- Rheological Behavior of Immiscible PS/PMMA Blends during Dynamic Plasticating Extrusion
- Rapid Fabrication of Microstructures onto Plastic Substrates by Infrared Hot Embossing
- Design of Calibrators for Profile Extrusion – Optimizing Multi-step Systems
- Inhibition of Thermal Oxidation Destruction of PBT/HDPE Blends by Organic Compounds of Five-valent Phosphorus
- Non-isothermal Model for the Drive Power Calculation of Single-screw Plasticating Units
- PPS News
- PPS News
- Seikei-Kakou Abstracts
- Seikei-Kakou Abstracts
