Tribological behavior and morphology of PTFE particulate-reinforced POM matrix composites
-
Qi Liu
and
Mei Liang
Abstract
The friction and wear properties of polyoxymethylene/polytetrafluoroethylene (POM/PTFE) composites were investigated by using a block-on-ring friction tester and special focus was paid to the effect of weight average molar mass (Mw) of POM. To study the thermodynamic characteristics and wear mechanism of composites, differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) were used. Results showed that friction and wear properties of the composite blends were strongly affected by the Mw of POM and the loading fractions of PTFE. POM/PTFE composites with lower Mw of POM owned better wear resistance abilities under a high-speed sliding regime, which resulted from the effective lubrication of transferred wear debris under a relatively high sliding speed. However, the transfer layer on the counterface could be easily peeled off under the low sliding speed, resulting in higher wear rate of POM/PTFE composites with lower Mw of POM. POM and its composites with high Mw showed comparative high friction levels, related to the strong adhesion between the resin and the steel counterpart. DSC analysis showed that POM with lower Mw had higher crystallinity, which was beneficial to the improvement of wear resistance in a high-speed sliding condition.
Acknowledgments:
The authors would like to thank the National Nature Science Foundation of China (51273118) and the Science and Technology Pillar Program of Sichuan (2013FZ0006) for financial support and the Analytical and Testing Center of Sichuan University for providing SEM observations.
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Articles in the same Issue
- Frontmatter
- Original articles
- Pulverization of end-of-life tires by ultra-high pressure water jet process
- Tribological behavior and morphology of PTFE particulate-reinforced POM matrix composites
- Effect of the matrix plasticization behavior on mechanical properties of PVC/ABS blends
- Bulk cure study of nanoclay filled epoxy glass fiber reinforced composite material
- Improvement of interlaminar shear strength of 2.5D fabric laminated composites with short-cut web interlayer
- Optimizing of vented injection molding on mechanical performance and miscibility of recycled poly(ethylene terephthalate) and polycarbonate blends
- Comparison of material properties in butt welds of used and unused polyethylene pipes for natural gas distribution
- Enhancing the potential of employing thermosetting powder recyclates as filler in LLDPE by structural modifications
- Micro-roughening of polyamide fabric using protease enzyme for improving adhesion strength of rubber-polyamide composite
- The real time optical transmittance of swollen heterogeneous natural rubber/poly (ethylene-co-vinyl acetate) blends
- Preparation and characterization of anti-fouling PVDF membrane modified by chitin
Articles in the same Issue
- Frontmatter
- Original articles
- Pulverization of end-of-life tires by ultra-high pressure water jet process
- Tribological behavior and morphology of PTFE particulate-reinforced POM matrix composites
- Effect of the matrix plasticization behavior on mechanical properties of PVC/ABS blends
- Bulk cure study of nanoclay filled epoxy glass fiber reinforced composite material
- Improvement of interlaminar shear strength of 2.5D fabric laminated composites with short-cut web interlayer
- Optimizing of vented injection molding on mechanical performance and miscibility of recycled poly(ethylene terephthalate) and polycarbonate blends
- Comparison of material properties in butt welds of used and unused polyethylene pipes for natural gas distribution
- Enhancing the potential of employing thermosetting powder recyclates as filler in LLDPE by structural modifications
- Micro-roughening of polyamide fabric using protease enzyme for improving adhesion strength of rubber-polyamide composite
- The real time optical transmittance of swollen heterogeneous natural rubber/poly (ethylene-co-vinyl acetate) blends
- Preparation and characterization of anti-fouling PVDF membrane modified by chitin
