TIT# Transcrystallization with Reorientation in Drawn PET/PA12 Blend
     as Revealed by WAXS from Synchrotron Radiation
AUT# Sapoundjieva, D.; Denchev, Z.; Evstatiev, M.; Stribeck, N.; Stamm, M.
SOU# J. Mater. Sci. (1999), 34, 3063-3066
LOC# xv034 @selbst.ftx
CLA#
COM#
APP#
MAT#
ABS# Studying the isotropisation kinetics during melting of a drawn
     poly(ethylene terephthalate)/polyamide 12 (PET/PA12) blend (60/40 wt.%)
     at $T_m^{PA12} < T_a < T_m^{PET}$ by means of wide-angle X-ray scattering
     (WAXS) from synchrotron radiation a transcrystallization behaviour of
     PA12 was observed. It was also found that the nonisothermal transcrystallization
     behaviour of PA12 taking place during cooling down of the molten PA12 is
     characterized by reorientation of PA12 chain axis by 90° with respect
     of PET chains axis and of the starting chains axis direction as concluded
     from the WAXS patterns. A conclusion is drawn that PET microfibrils are
     not only effective nuclei for transcrystallization of the matrix but they
     cause a drastic reorientation of the matrix chains placing them perpendicular
     to the initial common for both PET and PA12 orientation direction.