Rheological Indicators for Environmental Stress Cracking Resistance of Polyethylene
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P. Sardashti
, C. Tzoganakis , M. Zatloukal , M. A. Polak und A. Penlidis
Abstract
Most studies on environmental stress cracking resistance (ESCR) of polymers have focused on performing mechanical tests in the solid state. In this work, investigations in the melt state were carried out, to identify potential melt indicators for a relative measure of ESCR. A normalized characteristic relaxation time (λN), obtained from dynamic shear experiments, was established as a valid measure of ESCR of linear low density polyethylene, where a large content of short chain branches is present. In addition, the melt strain hardening coefficient (MSHC), obtained from extensional rheological methodologies, was found to be another potential and reliable indicator of ESCR. An inverse correlation between MSHC and ESCR was observed, indicating an inverse relationship between ESCR and chain extensibility in the melt. Furthermore, a new factor called “melt hardening stiffness (mHS)” was developed from the slope of a stress vs. Hencky strain obtained from a Sentmanat extensional rheometer. mHS was found to be another promising indicator of ESCR obtained from rheological studies conducted in this work.
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© 2015, Carl Hanser Verlag, Munich
Artikel in diesem Heft
- Contents
- Contents
- Regular Contributed Articles
- Extrusion Defects and Flow Instabilities of Molten Polymers
- Investigating Thermal Stability and Flame Retardant Properties of Synthesized Halloysite Nanotubes (HNT)/Ethylene Propylene Diene Monomer (EPDM) Nanocomposites
- Absorption Coefficient Measurement in Laser Transmission Welding of Thermoplastics
- Styrene/Isoprene/Styrene Thermoplastic Elastomer Prepared by Anionic Bulk Polymerization in a Twin-Screw Extruder
- Improving Film Die Flow Uniformity Using Optimization Methods Coupled with Finite Element Computational Fluid Dynamics (CFD) Analysis
- UV-Curable Technique of Magnetic Roller Soft Mold and Microstructure Pattern Replication
- Rheological Indicators for Environmental Stress Cracking Resistance of Polyethylene
- Effect of Alumina Particles Embedded in Natural Rubber Foams on Cell Morphology and Thermo-Mechanical Properties
- Effects of SEBS-g-MA on Rheology, Morphology and Mechanical Properties of PET/HDPE Blends
- Measurement and Numerical Simulation of Void and Warpage in Glass Fiber Reinforced Molded Chunky Parts
- Experimental Study for Extrusion of Polypropylene/Wood Flour Composites
- A Personal Perspective on the Use of Modelling Simulation for Polymer Melt Processing
- Slip Heating in Die Drool with Viscous Dissipation
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei Kakou Abstracts
Artikel in diesem Heft
- Contents
- Contents
- Regular Contributed Articles
- Extrusion Defects and Flow Instabilities of Molten Polymers
- Investigating Thermal Stability and Flame Retardant Properties of Synthesized Halloysite Nanotubes (HNT)/Ethylene Propylene Diene Monomer (EPDM) Nanocomposites
- Absorption Coefficient Measurement in Laser Transmission Welding of Thermoplastics
- Styrene/Isoprene/Styrene Thermoplastic Elastomer Prepared by Anionic Bulk Polymerization in a Twin-Screw Extruder
- Improving Film Die Flow Uniformity Using Optimization Methods Coupled with Finite Element Computational Fluid Dynamics (CFD) Analysis
- UV-Curable Technique of Magnetic Roller Soft Mold and Microstructure Pattern Replication
- Rheological Indicators for Environmental Stress Cracking Resistance of Polyethylene
- Effect of Alumina Particles Embedded in Natural Rubber Foams on Cell Morphology and Thermo-Mechanical Properties
- Effects of SEBS-g-MA on Rheology, Morphology and Mechanical Properties of PET/HDPE Blends
- Measurement and Numerical Simulation of Void and Warpage in Glass Fiber Reinforced Molded Chunky Parts
- Experimental Study for Extrusion of Polypropylene/Wood Flour Composites
- A Personal Perspective on the Use of Modelling Simulation for Polymer Melt Processing
- Slip Heating in Die Drool with Viscous Dissipation
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei Kakou Abstracts