Microstructure and Prediction of Stress-strain Behaviour of Cold-rolled PP Sheets
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S. Z. Wu
Abstract
A constitutive equation for cold-rolled polypropylene is presented based on a modified two-phase model for semicrystalline polymer, which combines the crystalline network that obeys the Langevin based theory and the entangled network with slip-linked character. The microstructure of the rolled semicrystalline polymer consists of packed crystalline inclusions which are separated by adjacent amorphous regions. A theoretical description of the stress strain behavior is obtained by the sum of the stress effects from crystalline and entangled networks. The microstructural observations by scanning electron microscopy X-ray pole figures and differential scanning calorimetry show that polymer chains are aligned along the rolling direction. The stress-strain equation can be obtained from the modified two-phase model and verified by experimental results.
© 2001, Carl Hanser Verlag, Munich
Articles in the same Issue
- Editorial
- Tenth of a Series: Pioneer of The Polymer Thermoset Industry – Leo-Hendrik Baekeiand
- Screw Extrusion
- Effects of Process Conditions on the Dissolution of Carbon Dioxide in PS in Foaming Extruders
- The Design of Extrusion Screws: An Optimization Approach
- Generalized Flow of Ellis Fluid in the Screw Channel
- Generalized Flow of Ellis Fluid in the Screw Channel
- Experimental Study of Melting in an Intermeshing Counter-Rotating Twin Screw Extruder
- Reactive Extrusion
- A Dynamic Model for Multiple Steady States in Reactive Extrusion
- Fiber and Film
- PA612 Double Bubble Tubular Film Process – Processability and Structure Development
- Injection Molding
- Injection Molding Technology for High Speed Optical Disk
- Three-dimensional Filling and Post-filling Simulation of Polymer Injection Molding
- Cold Rolling
- Microstructure and Prediction of Stress-strain Behaviour of Cold-rolled PP Sheets
Articles in the same Issue
- Editorial
- Tenth of a Series: Pioneer of The Polymer Thermoset Industry – Leo-Hendrik Baekeiand
- Screw Extrusion
- Effects of Process Conditions on the Dissolution of Carbon Dioxide in PS in Foaming Extruders
- The Design of Extrusion Screws: An Optimization Approach
- Generalized Flow of Ellis Fluid in the Screw Channel
- Generalized Flow of Ellis Fluid in the Screw Channel
- Experimental Study of Melting in an Intermeshing Counter-Rotating Twin Screw Extruder
- Reactive Extrusion
- A Dynamic Model for Multiple Steady States in Reactive Extrusion
- Fiber and Film
- PA612 Double Bubble Tubular Film Process – Processability and Structure Development
- Injection Molding
- Injection Molding Technology for High Speed Optical Disk
- Three-dimensional Filling and Post-filling Simulation of Polymer Injection Molding
- Cold Rolling
- Microstructure and Prediction of Stress-strain Behaviour of Cold-rolled PP Sheets
