Porous rods of poly(tetrafluoroethylene) (PTFE) were fabricated by molding PTFE powder and fumaric acid (FA) at room temperature, and sintering at 400 °C. The microstructures of the molding mixtures were observed with a scanning electron microscope (SEM). High-resolution images of SEM revealed that the fibrous structure heated at 310 °C is composed of small particles of PTFE connected with fibrils, and these particles were sintered into grains after heating at 400 °C. Pore size could be controlled by changing the volume fraction of FA.
- Takenobu Kanazawa
- Yasuhiro Matsuda
- Shigeru Tasaka
