
292 HIGH PERFORMANCE POLYMERS
the mechanical properties of the filaments has been
assessed. The incorporation of the nanoparticles by
melt intercalation improves the tenacity and toughness
of the resulting fibers.
Fibers and yarns made with partially aromatic
polyamides show a superior flame retardancy over tra-
ditional flame retardant PA66 fabrics [62]. Further,
these materials, when blended with other flame retar-
dant fibers, do not demonstrate the dangerous scaffold-
ing effect that is common with flame retardant PA66
blended fabrics.
12.5.2 Transparent Ty pes
An empirical rule that predicts whether a co-poly-
(amide) is amorphous or crystalline has been