Diffusion of Organometallic Compounds into High-Speed Spun Poly(Ethylene Terephthalate) Fiber in Supercritical Carbon Dioxide Fluid

Abstract

High-speed spun poly(ethylene terephthalate) (PET) fibers that had higher crystallinity, larger crystallite sizes, and lower birefringence than ordinarily spun PET showed higher penetrability to Fe₃(CO)₁₂ and its derivatives in supercritical carbon dioxide fluid at a temperature of 50°C–80°C and a pressure of 18.2–19.3 MPa. The sizes of the channels caused by the fibrillation of PET fibers in supercritical CO₂ fluid influenced the penetrability of these organometallic compounds.

Keywords:

• Diffusion
• High-speed spinning
• Poly(ethylene terephthalate)
• Supercritical carbon dioxide fluid

ACKNOWLEDGMENT

We are extremely grateful to Prof. Takao Ikariya (Tokyo Institute of Technology) for his valuable comments and heartfelt support of the SFD tests.