Microstructure and Tribological Properties of TPU/Fluoropolymer Composites
-
K. Rohm
Abstract
A network of poly(tetrafluoroethylene) (PTFE) microfibers in a thermoplastic polyurethane (TPU) was prepared by melt mixing the TPU with solid PTFE particles. The effect of rotor speed on the fiber dimensions was investigated. Higher shear stress was found to be the critical parameter for producing thinner PTFE fibers, rather than the shear rate imposed by the mixer. Shear stress transfer from the melt to the PTFE crystal results in solid phase plastic deformation, and the efficiency of the deformation depends on the shear stress in the matrix. All of the PTFE fiber/TPU composites show lower coefficients of friction compared with the neat TPU. The magnitude of the coefficient of friction was found to correlate with the interfacial area between PTFE and TPU generated by the microfiber network. However, for macroscale PTFE agglomerates, the reduction in the coefficient of friction is mostly affected by the uneven distribution of PTFE in the bulk and on the molded part surface.
© 2020 by Walter de Gruyter Berlin/Boston
Articles in the same Issue
- Titelei
- CONTENTS
- EDITORIAL
- Special issue for Pierre J. Carreau
- Regular Contributed Articles
- Microstructure and Tribological Properties of TPU/Fluoropolymer Composites
- Optimization and Scale-Up of Twin-Screw Reactive Extrusion: The Case of EVA Transesterification
- The Effect of Physical Aging on the Mechanical Properties of Raw, Treated and Compatibilized Coir Fibers-Based Polyisoprene Bio-Composites
- Film Blowing of PHB-Based Systems for Home Compostable Food Packaging
- Inverse Rheological Methods for the Determination of Polymer Structures, Diffusion of Small Molecules and Nanofiber Lengths
- Preparation, Characterization and Processing of PCL/PHO Blends by 3D Bioplotting
- Modeling and Numerical Simulation of Laminated Thermoplastic Composites Manufactured by Laser-Assisted Automatic Tape Placement
- A Surfactant-Free Microfluidic Process for Fabrication of Multi-Hollow Polyimide Aerogel Particles
- Preparation and Characterization of Reduced Graphene Oxide Based Natural Rubber Nanocomposites
- A Comparison of CO2 and N2 Foaming Behaviors of PP in a Visualization System
- PPS NEWS
- SEIKEI-KAKOU ABSTRACTS
- INSTRUCTIONS TO AUTHORS
- PPS Membership Application/Impressum
Articles in the same Issue
- Titelei
- CONTENTS
- EDITORIAL
- Special issue for Pierre J. Carreau
- Regular Contributed Articles
- Microstructure and Tribological Properties of TPU/Fluoropolymer Composites
- Optimization and Scale-Up of Twin-Screw Reactive Extrusion: The Case of EVA Transesterification
- The Effect of Physical Aging on the Mechanical Properties of Raw, Treated and Compatibilized Coir Fibers-Based Polyisoprene Bio-Composites
- Film Blowing of PHB-Based Systems for Home Compostable Food Packaging
- Inverse Rheological Methods for the Determination of Polymer Structures, Diffusion of Small Molecules and Nanofiber Lengths
- Preparation, Characterization and Processing of PCL/PHO Blends by 3D Bioplotting
- Modeling and Numerical Simulation of Laminated Thermoplastic Composites Manufactured by Laser-Assisted Automatic Tape Placement
- A Surfactant-Free Microfluidic Process for Fabrication of Multi-Hollow Polyimide Aerogel Particles
- Preparation and Characterization of Reduced Graphene Oxide Based Natural Rubber Nanocomposites
- A Comparison of CO2 and N2 Foaming Behaviors of PP in a Visualization System
- PPS NEWS
- SEIKEI-KAKOU ABSTRACTS
- INSTRUCTIONS TO AUTHORS
- PPS Membership Application/Impressum
