M5 fiber
M5 fiber (polyhydroquinone-diimidazopyridine or PIPD) is a high-strength synthetic fiber first developed by the Dutch chemical firm AkzoNobel.[1] It is produced in the United States by the Magellan Systems International, which became a division of DuPont.
Preparation
M5 fiber is prepared by a
diphosphorus pentoxide as a dehydrating agent. The polymer mixture is then heated and extruded to form brightly blue polymer fibers. The fibers are then washed extensively with water and base in order to remove the phosphoric acid
generated by the hydration of diphosphorus pentoxide from the polymer.
Next the fiber is heated, to remove water, and exposed to controlled stress, enabling the intermolecular
hydrogen bonds
to be created, thus increasing the strength of the polymer by aligning the molecular structure of the fiber in a better configuration for tensile and compressive strength.
Properties
M5 has a
M5 has "very high levels" of fire resistance, flame retardancy, and chemical resistance, especially high for an organic fiber.[4] It is less brittle than carbon fiber and will yield when stretched.
References
- ^ .
- ^ "M5 Fibre - an overview | ScienceDirect Topics". www.sciencedirect.com. Retrieved 2023-02-09.
- ^ René Lohmann. "Teijin Aramid" (PDF). Teijin Aramid. p. 64.
- ^ "M5 Fibre - an overview | ScienceDirect Topics". www.sciencedirect.com. Retrieved 2023-02-09.