Modeling Temperature and Time Dependence of the Wetting of Tool Steel Surfaces by Polymer Melts
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G. Zitzenbacher
Abstract
Beside the surface properties of the tool material, its temperature is an important parameter influencing the wettability of the tool surface by polymer melts in extrusion technology and injection molding. The temperature and time dependence of the contact angle of a polypropylene and a polymethylmethacrylate melt on polished tool steel was studied in this work at close to process conditions. The experiments were conducted by placing the polymeric sample on the hot tool material substrate in a high temperature chamber and recording the drop shape dependence on time. Based on the experimental results, a novel model was developed which allows a description of the contact angle dependent on temperature and time. The contact angle of the investigated polymer melts exhibits a linear decrease with rising temperature, which means that the wettability of the tool material by the polymer melt is improved with increasing temperature. Furthermore, the model proposed herein enables a complete mathematical description of the contact angle of polymer melts on the tool material dependent on temperature and time. The parameters of this function are the initial contact angle θ0, the contact angle when time approaches infinity θ∞ and a characteristic material time B. The time dependency is incorporated by an exponential function. The characterizing contact angle parameters (θ0, θ∞) follow a linear decrease with rising temperature. The characteristic material time B obeys an exponential law dependent on the reciprocal value of temperature similar to Arrhenius' law.
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Articles in the same Issue
- Contents
- Contents
- Regular Contributed Articles
- Swelling Properties and Environmental Responsiveness of a Superabsorbent Composite Microsphere Based on Starch-g-Poly(acrylic acid)/Organo-Mordenite
- Study on Permeability of Porous Ultra-High Molecular Weight Polyethylene (UHMWPE)
- Precise Fabrication of Fresnel Flash Lens Featured with V-Grooved Microstructures
- Ion Etching Induced Surface Patterns of Blend Polymer (Poly Ethylene Glycol – Poly Methyl Methacrylate) Irradiated with Gamma Rays
- Devulcanization of Scrap Tire Rubber with Supercritical CO2: A Study of the Effects of Process Parameters on the Properties of Devulcanized Rubber
- Forming of Thermoplastic Matrix Composites with Gas Pressure – the Influence of Blank Holder and Sheet Temperature on the Forming Pressure and Drawing Ratio
- Time Dependence of Morphology and Mechanical Properties of Injection Molded Recycled PET
- A Generalized 2D Output Model of Polymer Melt Flow in Single-Screw Extrusion
- Flow Behavior of PP-Polymer Nanocomposites in Capillary and Injection Molding Dies
- A Recollection with Respect to Flow Induced Crystallization in Polymer Melt Processing
- Optical Properties of HDPE in Injection Molding and Injection Press Molding for IR System Lenses Part II: Mold Temperature and Surface Roughness Effects on Injection Molding
- Modeling Temperature and Time Dependence of the Wetting of Tool Steel Surfaces by Polymer Melts
- Modification Induced by Gamma Irradiation in Polystyrene/Poly(methyl methacrylate) Blends
- Rapid Communications
- Study on the Influence of Extrusion Temperature and Extrusion Die on the Properties of Self-Reinforced PP Sheets
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts
Articles in the same Issue
- Contents
- Contents
- Regular Contributed Articles
- Swelling Properties and Environmental Responsiveness of a Superabsorbent Composite Microsphere Based on Starch-g-Poly(acrylic acid)/Organo-Mordenite
- Study on Permeability of Porous Ultra-High Molecular Weight Polyethylene (UHMWPE)
- Precise Fabrication of Fresnel Flash Lens Featured with V-Grooved Microstructures
- Ion Etching Induced Surface Patterns of Blend Polymer (Poly Ethylene Glycol – Poly Methyl Methacrylate) Irradiated with Gamma Rays
- Devulcanization of Scrap Tire Rubber with Supercritical CO2: A Study of the Effects of Process Parameters on the Properties of Devulcanized Rubber
- Forming of Thermoplastic Matrix Composites with Gas Pressure – the Influence of Blank Holder and Sheet Temperature on the Forming Pressure and Drawing Ratio
- Time Dependence of Morphology and Mechanical Properties of Injection Molded Recycled PET
- A Generalized 2D Output Model of Polymer Melt Flow in Single-Screw Extrusion
- Flow Behavior of PP-Polymer Nanocomposites in Capillary and Injection Molding Dies
- A Recollection with Respect to Flow Induced Crystallization in Polymer Melt Processing
- Optical Properties of HDPE in Injection Molding and Injection Press Molding for IR System Lenses Part II: Mold Temperature and Surface Roughness Effects on Injection Molding
- Modeling Temperature and Time Dependence of the Wetting of Tool Steel Surfaces by Polymer Melts
- Modification Induced by Gamma Irradiation in Polystyrene/Poly(methyl methacrylate) Blends
- Rapid Communications
- Study on the Influence of Extrusion Temperature and Extrusion Die on the Properties of Self-Reinforced PP Sheets
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts