Thermal/Peroxide Induced Degradation and Maleation of Polypropylene by Reactive Extrusion
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B. J. Kim
Abstract
Experimental studies of three types of reactive extrusion are reported: thermal degradation, peroxide induced degradation and maleation of polypropylene for intermeshing modular co-rotating and counter-rotating twin screw extruder. The studies were carried out in a modular intermeshing twin screw extruder which can be co-rotating or counter-rotating and possesses different screw configurations. Generally thermal degradation was found to be more effective in intermeshing counter-rotating twin screw extruders when similar screw configurations and operating conditions are used. For peroxide induced degradation both counter-rotating and co-rotating machines performed about the same. For the maleation reaction the co-rotating twin screw extruder achieves higher conversions than the counter-rotating machine with all screw configurations and conditions studied. It would appear that the intermeshing counter-rotating twin screw extruder operates at a higher temperature and has poorer mixing characteristics than the co-rotating machine. Differences between the co-rotating and counter-rotating machines decrease with introduction of kneading disc blocks.
© 1995, Carl Hanser Verlag, Munich
Articles in the same Issue
- Contents
- Contents
- Editorial
- Fifteenth in a Series: Ikegai Corporation: From Engine Lathes to Twin Screw Extruders
- Die Extrusion
- Analysis of Polymer Flow through Coathanger Melt Distributors
- Viscosity and the Formation of Die Drool at the Polymer-Metal Interfaces
- Flow Implications in the Processing of Tetrafluoroethylene/Hexafluoropropylene Copolymers
- Reactive Processing
- Thermal/Peroxide Induced Degradation and Maleation of Polypropylene by Reactive Extrusion
- Fibers and Films
- Biaxially Oriented Polyethylene Films by Compression of Injection Moldings
- Tubular Film Blowing
- Tubular Film Blowing
- Molding
- Elastic Calculation of Residual Stresses in Injection Molding
- On the Limitations of Shear Induced Crystallization in Polypropylene Melts
- Structure and Properties of Injection Moldings of β-Crystal Nucleator-Added Polypropylene
- Study on the Performance of Cooling Systems in Precision Injection Molds
- Measurement of Planar Orientation of Fibers for Reinforced Thermoplastics Using Image Processing
- Welding
- Dynamics and Structure Development in Spin Welding of Polyvinylidene Fluoride Cylindrical Rods
Articles in the same Issue
- Contents
- Contents
- Editorial
- Fifteenth in a Series: Ikegai Corporation: From Engine Lathes to Twin Screw Extruders
- Die Extrusion
- Analysis of Polymer Flow through Coathanger Melt Distributors
- Viscosity and the Formation of Die Drool at the Polymer-Metal Interfaces
- Flow Implications in the Processing of Tetrafluoroethylene/Hexafluoropropylene Copolymers
- Reactive Processing
- Thermal/Peroxide Induced Degradation and Maleation of Polypropylene by Reactive Extrusion
- Fibers and Films
- Biaxially Oriented Polyethylene Films by Compression of Injection Moldings
- Tubular Film Blowing
- Tubular Film Blowing
- Molding
- Elastic Calculation of Residual Stresses in Injection Molding
- On the Limitations of Shear Induced Crystallization in Polypropylene Melts
- Structure and Properties of Injection Moldings of β-Crystal Nucleator-Added Polypropylene
- Study on the Performance of Cooling Systems in Precision Injection Molds
- Measurement of Planar Orientation of Fibers for Reinforced Thermoplastics Using Image Processing
- Welding
- Dynamics and Structure Development in Spin Welding of Polyvinylidene Fluoride Cylindrical Rods
